It tells you that there’s a sustainable business model. Less ambiguity often translates to more comfort.

Not really, ive paid plenty of subscriptions to services that later shuttered and not paid for plenty of things long kicking. And vice versa of course.

Ambiguity goes away by understanding the total finance model not by knowing you paid 5 bucks.

That being said I'd like to at least cover my cost to them to see it better grow. A payment isnt the same thing as that though it only tells you you at least paid a portion e.g. buying a smart tv doesnt mean you now know the tv cost less than that to make.

Counterexample: Wikipedia.

True. However, every year they send a campaign that makes it sound like they absolutely will not survive.

Which is/was a lie - they always had more money than they could spend. (They reduced the aggressiveness of their wording over the past years in response to criticism.)