You can use storj to host your files without using blockchain. I think they accept credit cards directly. Also storj is doing a lot to make sure only reliable hosts are allowed to continue to operate on the network. If you aren't serious about having a reliable hosting node then you'll eventually get booted from the network.
> You can use storj to host your files without using blockchain
Can you use storj to host anything at all, regardless of blockchain? As far as I can tell they don’t have a product in the market.
Blockchain is just for payments, the actual object store doesn't use it