I do no think its completely unsustainable considering many people don't use the full storage allotted to them and because Koofr and PCloud both have subscription based plans as well with more storage which would help cover the 'lifetime' users.
Its not like Google's 'unlimited' Drive which they used to offer until data hoarders started 'abusing' it.
Another way you can have an offsite backup is having another NAS at a relative's house in a different city. You can use ZeroTier or TailScale to access it without any port forwards.
Its not like Google's 'unlimited' Drive which they used to offer until data hoarders started 'abusing' it.
Another way you can have an offsite backup is having another NAS at a relative's house in a different city. You can use ZeroTier or TailScale to access it without any port forwards.