Twitter is leaving the door open for targeted advertising on its service in a shake up of its terms and conditions announced over the weekend.
The company maintains its right to distribute advertising, and says that the type and extent of its advertising is subject to change.
It says, "The Services may include advertisements, which may be targeted to the Content or information on the Services, queries made through the Services, or other information. The types and extent of advertising by Twitter on the Services are subject to change."
It says that in return for the use of Twitter, individuals "agree that Twitter and its third party providers and partners may place such advertising on the Services or in connection with the display of Content or information from the Services".
Co-founder Bizz Stone has said before that the company wants to keep its options open, and its new terms of service allows it to do that.
The company also asserted that "tweets" belong to the user who writes them - but adds, "Twitter is allowed to 'use, copy, reproduce, process, adapt, modify, publish, transmit, display and distribute' your tweets because that's what we do. However, they are your tweets and they belong to you."
Stone also mentioned changes to the company's policy on spam, and said Twitter is currently building a set of guidelines for use of the API.
He said, "It is important that everyone who tweets, develops apps, or is simply interested in Twitter understands that it's not about the technology, it's about how we all use the service that matters most."