You can ask the same questions about GWG games. I think the reason they are worth it to practiclly give away free is that either 1) once you have the basegame free, you might spend money on DLC 2) the games are at the point where they barely sell any new copies, this might be due to do age, second hand market and other reasons 3) to market upcoming games, you get to play FIFA or whatever for freee and go like "wow, nice game, I'll get the next one when it comes out" and you also get 10% discount for it now.But it's pretty safe to say that new games wont pop up in vault. I'd say 4-6 months typically minimum and probably requiring the game's own salling power running out, so it becomes financially smart to add it in a service like this that generates them money for games that otherwise wouldnt.Right now there is no special catch. Full game, full achievements, no LIVE Gold required (except for MP as always), games will be yours to play as long as you have EA Access sub running, all for the silly low annual price (monthly price isnt really worth it).