Hmm. Actually just visited their site both with private browsing, and via Tor. Worked just fine.
If they aren't going to such ridiculous extremes, then they're no worse than Facebook and company (meaning, measured use is reasonable.)
BTC Books, if you do try it on a phone w/o service and have issues, it would be good to know. I suspect you won't though.
Well, I got it onto an Android tablet without any trouble - no 3G and I disabled GPS. It's Android 2.3 though, so I can't get the 'send to yourself' option that I'm told is in Gyft's latest upgrade. So two users, two Facebook accounts (the new version of Google+ doesn't work on 2.3; it needs the Google Play Store (instead of the Market), which also doesn't work on 2.3), and two email accounts.
Yucch.
So my old smartphone is dead, but I'm getting a newer HTC in a couple of days from a friend for free. Runs Android 4 point something - ICS. We'll see if that's simpler, and if it works. I'll let you know.