Twitter has three major agreements incorporated into their overall user agreement and then they have a series of sub-agreements for different uses of their service. Finding the terms is easy for registered users because they are presented to you in a click-wrap style agreement when you create an account. For unregistered users the terms are a bit hidden but they are available in one PDF. There are specific provisions limiting liability for content on the website, whether it is from Twitter, other users, or another third-party and a disclaimer for harm that may come to your machine as a result of using their services. This last part is especially troubling giving the proliferation of XSS attacks and Twitter's recent expansion of usernames to 50 characters.
Representations & Warranties
"Your access to and use of the Services or any Content are at your own risk. You understand and agree that the Services are provided to you on an “AS IS” and “AS AVAILABLE” basis. The “Twitter Entities” refers to Twitter, its parents, affiliates, related companies, officers, directors, employees, agents, representatives, partners, and licensors. Without limiting the foregoing, to the maximum extent permitted under applicable law, THE TWITTER ENTITIES DISCLAIM ALL WARRANTIES AND CONDITIONS, WHETHER EXPRESS OR IMPLIED, OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. The Twitter Entities make no warranty or representation and disclaim all responsibility and liability for: (i) the completeness, accuracy, availability, timeliness, security or reliability of the Services or any Content; (ii) any harm to your computer system, loss of data, or other harm that results from your access to or use of the Services or any Content; (iii) the deletion of, or the failure to store or to transmit, any Content and other communications maintained by the Services; and (iv) whether the Services will meet your requirements or be available on an uninterrupted, secure, or error-free basis. No advice or information, whether oral or written, obtained from the Twitter Entities or through the Services, will create any warranty or representation not expressly made herein."
Limitations on Liability
"TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE TWITTER ENTITIES SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL OR PUNITIVE DAMAGES, OR ANY LOSS OF PROFITS OR REVENUES, WHETHER INCURRED DIRECTLY OR INDIRECTLY, OR ANY LOSS OF DATA, USE, GOOD-WILL, OR OTHER INTANGIBLE LOSSES, RESULTING FROM (i) YOUR ACCESS TO OR USE OF OR INABILITY TO ACCESS OR USE THE SERVICES; (ii) ANY CONDUCT OR CONTENT OF ANY THIRD PARTY ON THE SERVICES, INCLUDING WITHOUT LIMITATION, ANY DEFAMATORY, OFFENSIVE OR ILLEGAL CONDUCT OF OTHER USERS OR THIRD PARTIES; (iii) ANY CONTENT OBTAINED FROM THE SERVICES; OR (iv) UNAUTHORIZED ACCESS, USE OR ALTERATION OF YOUR TRANSMISSIONS OR CONTENT. IN NO EVENT SHALL THE AGGREGATE LIABILITY OF THE TWITTER ENTITIES EXCEED THE GREATER OF ONE HUNDRED U.S. DOLLARS (U.S. $100.00) OR THE AMOUNT YOU PAID TWITTER, IF ANY, IN THE PAST SIX MONTHS FOR THE SERVICES GIVING RISE TO THE CLAIM. THE LIMITATIONS OF THIS SUBSECTION SHALL APPLY TO ANY THEORY OF LIABILITY, WHETHER BASED ON WARRANTY, CONTRACT, STATUTE, TORT (INCLUDING NEGLIGENCE) OR OTHERWISE, AND WHETHER OR NOT THE TWITTER ENTITIES HAVE BEEN INFORMED OF THE POSSIBILITY OF ANY SUCH DAMAGE, AND EVEN IF A REMEDY SET FORTH HEREIN IS FOUND TO HAVE FAILED OF ITS ESSENTIAL PURPOSE."
As of the 9.30.2016 version of the agreement, it does not include an indemnification provision.
"Content"- "...any information, text, links, graphics, photos, videos, or other materials or arrangements of materials uploaded, downloaded or appearing on the Services."
"Services"- "...our various websites, SMS, APIs, email notifications, applications, buttons, widgets, ads, commerce services, and our other covered services (https://support.twitter.com/articles/20172501) that link to these Terms."
"Information Sharing and Disclosure
We do not disclose your private personal information except in the limited circumstances
User Consent or Direction: We may share or disclose your information at your direction, such as when you authorize a third-party web client or application to access your account or when you direct us to share your feedback with a business. When you use Digits by Twitter to sign up for or log in to a third-party application, you are directing us to share your contact information, such as your phone number, with that application. If you’ve shared information, like
Direct Messages or protected Tweets, with another user who accesses Twitter through a third-party service, keep in mind that the information may be shared with the third-party service.
entity. We may also disclose information about you to our c orporate affiliates in order to help provide, understand, and improve our Services and our affiliates’ services, including the delivery of ads.
Public Information: We may share or disclose your public information, such as your public user profile information, public Tweets, or the people you follow or that follow you. Remember: your privacy and visibility settings control whether your Tweets and certain profile information are made public. Other information, like your name and username, is always public on Twitter, unless you delete your account, as described below.
Non-Personal, Aggregated, or Device-Level Information: We may share or disclose non-personal, aggregated, or device-level information such as the total number of times people engaged with a Tweet, the number of users who clicked on a particular link or voted on a poll in a Tweet (even if only one did), the characteristics of a device or its user when it is available to receive an ad, the topics that people are Tweeting about in a particular location, or aggregated or device-level reports to advertisers about users who saw or clicked on their ads. This information does not include your name, email address, phone number, or Twitter handle. We may, however, share non-personal, aggregated, or device-level information through partnerships with entities that may use data in their possession (including data you may have given them) to link your name, email address, or other personal information to the information we provide them. These partnerships require that they get your consent before doing so. You can control whether Twitter shares your information under these partnerships by using your Personalization and Data settings, available at h ttps://twitter.com/personalization."