Yeah, what OP is bizarrely describing as "push a subscription" with a (completely false) "im 12 and this is deep" insight about Anna Archive becoming the very thing they swore to destroy, can accurately be explained as them trying to ensure you get the benefits entitled by your donation level via your access key (linked to zero personal information).

I donate in 3 or 6 months chunks typically, if I forget, I don't get hassled to resubscribe or anything (nor could they even contact me for any reason), I just lose those bonus download benefits until I do it again. I could also generate a new key each time but it's convenient keeping the same one in my password manager so I like the way they do it now, basically works just like LWN.net.