I hope I caught your attention with the title, I just found out Microsoft have created this great offer, described here. I've already activated this on my personal OneDrive account. The only caveat is that you'd need to have U.S.-based IP address to sign up for Bing Rewards, and then you'll get a bit spam from Bing/OneDrive. You can unsubsribe from the mails with 1 click, though.
I think that after the 2 years, such offers will be standard, and I think this will be extended. But anyway, chances are you'll love it and continue the service even if they require something like $7 a month, which now gives you 1 TB and Office 365 Subscription.