So. A centralized service responsible for keeping your data. How is this different from literally anything else?

> it may still be in the network so long as the data is getting active use.

"Maybe" makes this essentially useless.

> It opens up a whole field of seed and harvest style information flows.

It really doesn't. It's literally the same problem that torrents have had for ages: anything "unpopular" doesn't exist for a very very very broad definition of unpopular.