[Veuxdo]

> No one questions whether Dropbox should be a one-off price or a subscription, there's obviously ongoing cost to storing the data.

I'd wager the data storage costs for Dropbox are less than 1% of what it charges for subscriptions, though.

[danpalmer]

I wouldn't be surprised, but I don't think it really matters. What matters is that customers attribute some cost to the providing of the service, rather than it being entirely free of variable cost.