I think I'm a little late, but I hope my voice still has a count. I would stick with option 1. I personally go onto the arcade once in awhile to kill time and have something to do and beat high scores. How to pick the games, I would cycle between all of the available games already and kinda change em out every month to keep everyone happy. I would say, if it were up to me, I too would be reluctant to pay for something that isn't completely necessary as of yet. Yes you can and more than likely will remain optimistic about getting more users, but I would also look at the other side of the sword and weigh the option of "what if we don't grow." or "what if we get two users a month". Then there'd be the waste of money and that's not any good. So hopefully seeing both sides helps you out?