Love the idea! Yes there are challenges (ref: 'Embrace and extend') but there is a very clear value: both for end users (that ultimately drive value) and for paying companies (startups or other) that have have great new products but have to deal with a market in which 'the current generation' of products are used.
From a different angle (that you're probably already considering :-): What about SaaS companies that also want to give customers a smooth way out if they are not satisfied. I can imagine that there is value in having some sort of 'seal' that makes it clear that: yes you can get out of here if our product is not what you want it to be.
Final note: I just hope that we’re not going to end up in a situation where we need to do a “ReCaptcha” again after logging in because some SaaS, x, is wary of scrapes….