> you've just reasserted "because they said so".
Yes. That is all that matters. That is the contract you've signed with the business, end of story.
They have their reasons (3P clients suck at caching, this is a subsidized tier to create subscription lock in, etc) but that's besides the point. If you sign a contract, you abide by its restrictions or you categorically abusing the offering.
> There is another alternative, which is to keep using it against their ToS and risk a ban.
No one working on a project of value and no sane business would do this. The people doing this are not serious/mature people.
Frankly any dev that intentionally does this at a real company would be fired.