Assuming a very hard 15% retention rate, based on the numbers for PC games here. We would be looking for 15,000 playersLudo Star Hack
to continue playing after a week. After several months, the figures are described as a retention rate of 3-5% of players. So optimistic, we would be seeing 5,000 players playing Rolls for more than a few months. Obviously, this is a percentage taken from a game, very different from Scrolls, so the rates are very different. Still, it shows how 100,000 copies do not necessarily mean a healthy player base.
http://freehackleaked.com/ludo-star-hack-unlimited-gems-coins-xp-free