Sometimes there is a trick that allows to play offline (I guess to bypass tags and restrictions), things like adding a line of text to a file, always a hassle and poorly documented.
Btw, I feel like telling that I deleted my rockstar account quite a while ago, they asked and re-asked nonsense, waiting from weeks to over a month between email and email, and the worst thing is that sometimes they were in chinese. It took me more than half a year to delete that crap.