I'm sorry if this already is something. But I was thinking maybe you could have people go and get players from other websites and stuff to get more people to play. Such as instead of just people, the bout cheetah community could register and be on gtop100, mmorpg website or whatever it is, and several others probably out there. But for people who do this, each player they get, will get them points, and with those points they can get either coins or gigas. Such as, I 4 people referred, i now have 4 points. I can get either 4000 coins, or 400,000 gigas. Those may not be exact prices or something but it is just for an example.
Thanks everyone, dont be too critical. ;P