headcannons about the power up methods

As it says in the title, does anyone have any headcanons about the power-up methods and how they work in detail?

My headcanon is that when a world fuses and has two of the same power-up methods, one of them changes. I think this is because none of the power-up methods share theirs with one in the same world.

But im mosty interested in how you think the power up methods work in more detail like prices for the two pay to win methods etc