This doesn't make much sense to me.
To put the strongest face on it, by "cracked" youtube, you mean a version that shows the cracker's ads and maybe somehow generates extra clicks (or whatever) so they can get money out of it?
Cracked spotify? In my mind that's just like YouTube, almost entirely server-side. I guess you're talking about hijacking ads here, too? I feel like a "real" crack of Spotify would let you listen to music for free, but that should be impossible (unless their SWE's are incompetent).
But in practice, these “apps that lookalike popular apps” are not intended to just be adware-less versions of the popular apps. They are frequently “hide the ads, inject the malware with more permissions” Trojan horses.
Google is doing the same thing the fake apps are doing. Real problem: bad ads. Solution: cracked app. Trojan: too many permissions, steals data.
Google: problem: bad apps. Solution: advanced Google DRM. Trojan: too many permissions, steals data.
My favorite was a local "discover which on your contacts is on the leaked Covid quarantine list[1]" scam app. It claimed that the extra permission dialogs are just fearmongering by Google, who is in cahoots with big pharma, and wants covid to spread to sell more medications.
[1] In fact, no such leak has ever taken place, its existence was just part of the setup for the scam.