The company that is programming the operating system is investing in a company that makes malware for said operating system. How they can't be considered involved? Once they invested the $140 million, they would be less likely to consider that malware as such. They won't block that malware with Google play protect, ignore the privacy issues that would lead to a ban on the play store, and so on.
Correct me if I'm wrong, but I don't don't see Apple investing even a dollar on a company that is making malware for iPhones
This isn't a part of Google. Likely carriers will try to put it on phones you get through them especially mid-range devices. Also it can be disabled (and even uninstalled through shizuku or ADB or something)
If a phone comes with this pre installed, nobody would ever uninstall it. Or even realize that the annoying ads are coming from this app. They would just think "ads everywhere, android is shit, next phone is going to be an iPhone".