Upload & Sell: Off
What is THEIR backup plan?
I think Monito's point is that we as photographers use up quite a bit of data. I know that I would use up more hard drive space online than what the hard drives cost - not to mention additional drives or tapes and staff for their backup/DR plan.
So lets say I'm paying $10/month, but using 1TB/year. That's effectively a great deal for me - not having to spend the money on additional drives.
But what happens when my data gets damaged/corrupted/lost on their server. They have to replace the drives, restore the backup, etc... That's going to cost them even MORE money to keep my service that isn't even paying for itself to begin with.
So, as a business, do you continue to provide service at a LOSS? As Monito said, they are in business for the masses who pay the monthly fee that store bits of data, not globs of it.
Take this example to an extreme - and they have a fire in their data center. ALL drives are lost. Need a new building, new servers, etc... Do you think they are going to invest in all that, or just close up shop?
IMO, use clouds while you can, as a convenience, while the bubble of them is still growing/evolving. But this business niche, like all other .com booms will burst, leaving a select few, charging appropriately to survive the challenges of growth, reliability and failover. But don't discount your OWN backup plan for when you get the email of them no longer providing service.