Definitely understand that mind-set. We review most of our decisions every year, but it's a tricky problem. Since Backblaze Online Backup is a flat-fee service, by definition most folks who have that much data would not be break-even customers for us, and adding in services that encourage those large customers wouldn't be a great long-term plan. That said, one thing you might be able to do is see how much more expensive an "unlimited" plan with your ISP would be for 1 month (hopefully less than the $60 extra). CrashPlan Small Business is a good service as well, so if you're happy with them and don't mind paying the extra few dollars a month, staying with them, from a bandwidth perspective isn't the worst.

And yea, I'm personally hoping that the ISP situation gets a bit more friendly towards consumers!