Point taken - a case of "never attribute to malice...", though I think the burden of clarity rests mostly on the party making the stipulation in the first place. Even if the intended message was as you suggest, it is an informative case of how not to get your message across.
Yeah, completely agree with you there. I think the wording is straight up terrible.
I can sort of understand how this gets implemented this way - Making an excellent experience for the users who are no longer interested in paying you is a great way to go out of business when you have other, more important, problems to solve.
That said, who ever wrote the copy for that button should no longer by allowed to write copy (at least not in english...)