They, like every other community site, have a ToS that grants them rights to publish and sublicense user submitted content. They couldn't function without it,

They, like every other community site, have a ToS that grants them rights to publish and sublicense user submitted content. They couldn't function without it, when you view a twitter feed with your browser and see sponsored trending topics, they're "selling" content: > You retain your rights to any Content you submit, post or display on or through the Services. By submitting, posting or displaying Content on or through the Services, you grant us a worldwide, non-exclusive, royalty-free license (with the right to sublicense) to use, copy, reproduce, process, adapt, modify, publish, transmit, display and distribute such Content in any and all media or distribution methods (now known or later developed). http://twitter.com/tos http://twitter.com/tos