Complex sentence: In May 2007, after abandoning the Skyblog.com brand, Skyrock.com was launched as a full-scale social network, with added functionalities such as friends, inbox, chat et profiles.
Split into simpler sentences: In May 2007, after abandoning the Skyblog.com brand, Skyrock.com was launched as a veritable, full-scale social network. On top of creating a blog, new social networking functions were added such as friends, inbox, chat et profiles.