Are you referring to some sort of asset marketplace with in-app purchases, or something like that? If so, I've never used it. I can say that you don't need to be logged in to use Affinity Photo, Designer, or Publisher: I don't even have an Affinity account, let alone do I need to log in to use the software. My recollection of buying their products is: you pay them over the web, they send an email with an activation code, you paste the code into the app, and that's it.
Maybe I’m wrong, my upgrade path was I just signed into my account through the app and it validated my version and downloaded all my assets (from the asset store).
Yeah, 2.5.something. I'm currently signed out, and can use the app (Publisher is the one I just tested) just fine. If I go to my Account page, it tells me I'm signed out, and it has a little message noting that I don't need to be logged in in order to use my purchases. I've never bought anything through their store, so I have never encountered any login gate.
Anyway, they're currently very lenient, but my guess is that that'll go away before long.
