Under 1% of users for over 50% of your mobile gaming revenue with a not single purchase model has been a good general estimate since 2010; I invite you to google an publicly available data on that.
From what I've seen privately 50% is a vast understatement.
And no, most of those users cannot afford what they spend.
They bring up gmp which i'm surprised to never see discussed here. Underpins so many tech stacks (+ gcc relies on it) and is basically always involved in the cryptography piece of those given how many rely on huge numbers.
https://en.m.wikipedia.org/wiki/Ring_(mathematics) it’s a little hard to describe as it’s fairly abstract.
It’s a structure that is subset of abelian groups (groups where operations on elements of the group don’t depend on the order written, ie x+y = y+x).
For example the set of ints with “normal” addition and multiplication is a communicative ring
Single turnip is ridiculous sure but that is hardly the average sub 5 $ purchase. I have seen people check out with single pieces of fruit or like a gallon of milk regularly. Plus, in my state, you could easily get a single deli item for lunch or breakfast for ~5$ or under. Basket size (which is the term groceries use for the average purchase total) is about 50$ although it has gone up in covid19 times. That is the mean though- there is a ton of ~5$ and sub purchases