[Igelau]

(Twirls moustache)

Microtransactions. "Excavating your hallway. Time Remaining: 90 minutes -- Want it now? Buy TNT for 10 Gems!"

Gems can be bought for cash, or you can have some mined by paying Stars. The mine yield is somewhat random and the dwarfs need frequent breaks, but it sometimes includes loot like stupid hats you can use in the video. You only get Stars by referring people, connecting social media accounts, signing up for mailing lists, etc.

Gotta go now -- I can hear the RCMP riding in and these maidens aren't going to just tie themselves to the railroad tracks. Let me know where to send the bill for consulting!