cryptokitties

I've been wondering: how do Cryptokitties, Ethercraft and other clones devs make money off their platforms? Transaction fees (keeping some gas to themselves), early adoption (buying the first ever kitties) or something like that?

Hi guys, Just a few hours ago, a new decentralised RPG game based on the Ethereum Blockchain was revealed: ethercraft.io https://medium.com/@ethercraft/introducing-ethercraft-a-decentralized-rpg-running-on-the-ethereum-blockchain-3931bea40b3b Although this game is still being developed, you...

I started investing in CryptoKitties a few weeks ago. I was able to earn a couple of ether through siring it. However, I have to pull my earnings and invest it to Tronix TRX. I completely forgot about the charges for putting it to auction. Should I re-invest in CryptoKitties again?