You have to buy a Hero on the Marketplace with WBNB if u want to earn much in this game. Otherwise the free Heros aren't claiming any gTHC besides the Season Pass once every 2 months or so. Hero Floor ist currently at 0.4 WBNB. Im playing Cluster and im close to Bronze Rank! The earning depends on the price of gTHC currently around 0,5$ and i earn about 70-80 gTHC with my Hero (cost me 400$). With that Hero you can play like 12 battles a day and have a maximum cap of 0/212 battles for earning gTHC. After these battles complete the hero will not give any gTHC anymore besides the Season Pass!