If you're one of those people who tweets about what you had for lunch, you may soon get an advertisement with suggestions for where to buy your next meal.
Popular micro-blogging site Twitter has new terms-of-service which "leaves the door open" for customized, targeted advertising depending on what users are tweeting about.
"We're leaving the door open for exploration in this area but we don't have anything to announce," the company says in the new terms.
"The Services (provided by Twitter), may include advertisements, which may be targeted to the Content or information on the (website)," it says.
Twitter allows users to post a 140 character-maximum message and share it with anyone who chooses to "follow" them.
As it stands now, the website is advertisement-free, although spammers manage to make their way in by sending messages to the attention of individual users.
The new terms also say that users own their content, and give the three-year-old San Francisco-based website rights to publish it.
"This license is you authorizing us to make your Tweets available to the rest of the world and to let others do the same. But what's yours is yours - you own your content," it says in the terms of service.
The change comes on the heels of a new service agreement at competing social-networking website Facebook, which angered users earlier this year because of language that appeared to suggest Facebook would hold ownership of all content. Users who posted notes and photos expressed concern.
After the backlash, the company later backtracked.
In an email to users, Twitter co-founder Biz Stone says the new terms are not set in stone and could change. He invited user feedback.
