I have tons of free online storage across a few different companies. 3.5GB from Dropbox, 10GB from OneDrive, 25GB from Norton Zone*, and 10-15GB? from Google Picasa.
IMO, Dropbox is the easiest to use.
Why would anyone pay for online storage? I can understand how the can make money from businesses, but I doubt they get much from individuals.
*received extra 20GB for participating in the beta.