Earlier quoted context omitted.
I follow r/Datahoarder for best practices and methods for getting my own stuff (like HumbleBundle or purchased eBook libraries) to my own local storage but, some of them really abuse online storage providers. I cringe sometimes reading all the posts. Why on the world someone try to mirror nearly everything to somewhere like Scrat from the Ice Age?
https://en.wikipedia.org/wiki/Compulsive_hoarding
One of the backup services imposed a 12TB limit. Evernote reverted their unlimited data storage pledge, Google retired unlimited data in GSuite. I cannot say all of them due to hoarders but, Evernote CEO openly said that "People tried to zip and upload their backups to our servers. We're not that big".