From a hosters perspective (Score 1)

I work for a sizable hosting firm (over 10k clients). Our entry level plans will set you back about 50 euro/yr. If you want some kind of yearlong data guarantee, add another 50 quid there to pay for the storage. Not to mention the writing of, or modification of the system that will keep these for you.

That 50 euro buys you 10GB of storage ; that's a lot of storage that these people seem to want providers to pony up for free. And the bandwidth to download the data from the held backup.

There is no free lunch in this game; the margains are small enough to begin with.