I'd honestly even settle with something like a program where users can choose to enroll in these programs in some sort of test phase. Maybe put some kind of marker in the name or even on the logo that clearly informs and denotes "this product might not last long, it might go into production, it may die after 3 years, you have been warned".

There's a word for this but for some reason it eludes me (and apparently eludes google as well). At least it'd soften the blow when they inevitably roll things up on one of these so designated services.