[troupo]

There's a game that actually implements a lot of these mechanics called Last War. It's a base builder where you unlock more and more territory going through the "+10/*100" runs.

And oh my god is it boring. Not even base building helps it

[bryukh]

That's true; we implemented such a mechanic for one of the math educational games, and even if it looks interesting in theory and short iterations, playtests show it's boring and has no challenge.