My Lands: Black Gem Hunting

We know that the game are still live for let ppl spend BG for scale and buy artficts

So there is systeme that most of Game and mobile games using it called Offer Walls player whit play game or install game or complets free task the game owenrs will make money from the advirtiser and player will get BG for each tasks they will finsh so u add that offer Walls as payment method then player use it to top_up the BG