[anoncake]

Unlimited literally does mean unbounded, not "we don't tell you the limit". You cannot abuse a service by using it for its intended purpose. Storing data for possible later retrieval, even exabytes of data, is the purpose of a data storage service.

Storing large amounts of random data merely to waste space might qualify as abuse. But that is a) a strawman as far as I can tell and b) it isn't always possible to tell apart random and encrypted/compressed data apart anyway.