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Oh indeed yes, which is why for years now I've been warning people to not write to proprietary APIs in the first place. It's a faustian bargain and sooner or later the bill is going to come due! If not because of legal requirements, then because MS or Amazon saturates the market, and has to increase revenue somehow. This is an example of where an ounce of prevention is worth a pound of cure. The upshot is that ignoring the warnings of people like me was a mistake.
(It's funny how people have moaned for years about "vendor lock-in" WRT Oracle. "They charge for every core!" But the cloud providers charge for every invocation, which is infinitely worse. And yet no-one seems to worry about it. It's really odd.)