Yeah, because my answer is Yes, I do have an account, but NO, I don't use it any more since their rates are now unreasonable.
I used to use it when I could get the 3Gb a month package for one year.
But that option is no longer available.
Yes, from back when I had my first droid Samsung and they had a free 1gb promotion. Loaded up my PnP smartshopper account too for free data. But now I have 4 hours unlimited use and I have no idea where it came from.
No because it always seemed a bit iffy. Certainly wouldn't have a use for it more than once a month or so so no point in a paid for account. I get the "concept" behind having a massive footprint of wifi access points and a single account etc but it just hasn't really taken off enough to bother using it. (same as every other shared wifi thing)