Sort:  

My other question is, if its free for users, how do the game developers monetize?

Just like any other website. They can monetize any way they like. (Advertising, in app sales, etc)

Coin Marketplace

STEEM 0.13
TRX 0.29
JST 0.035
BTC 108477.45
ETH 2531.72
USDT 1.00
SBD 0.77