I think Joey and Meghan are on this season. They've made it pretty obvious too. Joey JUST started his collab month today. Also, Meghan has just released a video telling how her channel will be for the rest of the year where basically she hired a set of host to make videos on her channel for her. Also, Joey is like a huge Hunger Games fan and he hasn't really mentioned about going to see the movie (which comes out next week). I assume that Joey has his friend Stacy running his channel and social networks while hes gone because he has been hanging out with her alot lately. (Meghan probably has her brother run her channel and social networks since they live together). Also, as someone said can't remember who but it is clear that Elissa is running Rachel's twitter because I know how Elissa tweets and she is doing it with Rachel. I do think Tim & Marie declined because Marie is still tweeting and she recently made a video.