Let’s say you have a free game, that’s pretty popular. You offer some cosmetic stuff players can buy, and/or a few ads. The game gets really popular, and you exceed $200000 income. You also have millions of downloads of the game.
In that case you could end up owing unity money, because a download/install is not the same as a sale.
Now imagine you published this game a month ago and it’s popularity is climbing, and your income is slowly climbing too.
Do you gamble that the game will be profitable, or do you delist the game because you risk bankrupting yourself if you don’t?
Edit: also, what’s stopping them from changing it to $2 per install, or $20? You have no guarantee. Not something you’d feel comfortable building your business on, and sink years of development into.
Edit2:
geometry dash lite - 100M+ downloads
Roblox - 500M+ downloads
Solitaire - 10M+ downloads
angry Birds 2 - 100M+ downloads
If they’d be made in unity, they would each have owed unity millions just from downloads. I’m not sure they’re that profitable…