If you make a backup with a tool like Borg that creates encrypted archives, then using AWS S3 glacier is the cheapest.
What's bad about it: if you ever need those files again, it's going to be VERY expensive to download them again, so it has to be treated as the "what if a nuke hits my city and all the local and off-site backups are vaporized" solution
Also: it's not recommended to directly host plain files, they need to be in an archive format with big chunks, as the API calls that are used to list them during sync are counted in a very expensive way
Fuck Zynga, but "Method for presenting advertising in an interactive service" is clearly an invalid patent even if it was applied 20 years ago
It should be possible to patent only real stuff, not broad concepts that can be applied to everything