Bandcamp was sold to Songtradr in 2023, a large music corporation. Directly after that sale, Songtradr fired half of Bandcamp's staff.
As we've seen with virtually every other 'good' company that is sold off to a large corporation, it is virtually inevitable that it will begin to enshittifiy at some point in search of larger profits. It makes sense to promote a cooperative alternative not only as a form of prefiguration, but as preemptive self defense against eventual exploitation by the enshittifying company.