I would pay $15 a year for say 3 devices but I don't use it enough to pay $100 a year. As it is I basically just use it to store manuals, receipts etc.
It is the same with Dropbox. I'd pay $ 15 a year for 20 Gigs of storage but even their basic paid plan is just too much for me. So if I hit the limit in Dropbox I will just buy another external drive and be diligent with my backups.
I can't understand why companies like Evernote and Dropbox don't seem to get that there is a small fortune waiting out there for them if only they offered a proper "budget" price for a very basic and limited version of their software that satisfies the needs of thousands of potential customers rather than just focus on hundreds of "premium" ones.