Files vanished without warning and there was nothing I could do
Uploaded a batch of project backups without making an account, thinking the direct links would stick around. A few weeks later every single one returned 'file not found' because of their auto-deletion on inactive content. No email, no warning, no way to recover. If you don't pay for premium your stuff is basically temporary, which they don't make obvious enough.
Inactive files get deleted with no warning, no recovery without premium