The origin of the Ace of Hearts, page 2. (Patreon)

The monstermakers purport to live in a "Golden Palace", but it turns out that brass was cheaper, and better building material. Still couldn't stand up to Ace's explosion power.

The resource that makes Mini-Max's size-changing tech possible, is extremely limited, so it's not widespread. However, MiniMax is making a killing by shrinking & lightening payloads going into orbit, and then re-enlarging them once in orbit. There's defense satellites, orbital manufacturing, and the High Rock prison for metas, all financially possible thanks to him.