I like the way Dropbox designed its “getting started” functionality. I don’t have stats but I can imagine a lot of users dont read how-to’s, don’t watch product tours or enable complex functionalities when signing up for a new service. They just want to use the product. Trial and error rules.
Sometimes its a pitty because, with a little information on how to use an aplication, a newbie can instantly get more out of a certain product. But that’s the way we use technology.
Dropbox motivates their users with an 250Mb extra space (which costs almost nothing to them) and in return they get more skilled and socially-connected users. Everybody win.