Scribd has been like this for years and years. It's unlimited with a caveat.
I've
been a subscriber for something like 3 years and it's not new. It has nothing to do
with your free trial or canceling and has everything to do with royalties. Netflix
mostly owns the content on its platform now in order to avoid royalties. Scribd
doesn't own its catalogue at all. If you listen to a bunch of avon audiobooks you
lose the entire avon catalogue. If you listen to a bunch of recordedbooks books you
lose that whole catalogue. Listen to a bunch of Julia Quinn and lose the rest of
her back catalogue.
You say you had "unlimited" audiobooks but if you're not listening to about 6 you
won't hit the limit, or if you're listening to indie authors you won't hit the
limit. Listen to about three Lorraine Heath's and you will lose access to the rest.
There's nothing scammy about it you just didn't do a cursory google before you gave
them your money and are mad you didn't know something literally on their faq