Need WiFi? Existing BT Broadband customer?

[newsgroupmonkey]

http://www.btopenzone.com/offers/broadband.jsp

BTOpenzone are offering a deal to BT Broadband (BT Broadband, BT Yahoo! Broadband and BT Business Broadband) and BT Mobile customers only

If you meet the above criteria, you get 500 minutes for £1 per month for the first three months then £5 thereafter in thousands of Openzone locations. These now include hundreds of pubs, cafes and McDonalds outlets.

Full T&Cs here:
http://www.btopenzone.com/offers/broadband.jsp#specialterms

I don't want to incur the wrath of any mods, so I'll point out once again that you have to be a customer of one of the above services, this isn't open to everyone, but if you're already a customer it's a great deal! It's also on the main site from the front page (so no special emails or anything)

[Dodgy]

I got the email too, except I'm not a customer of any of the above. I did, however, participate in the free week's wifi promotion from about a year back or so. I think I will give it a try, after all, they invited me? :)
Anyone else had a go? Even £5 is extremely cheap for 500 minutes, which lets face it, is more than you probably need for email checking whilst having a brew in Starbucks :)

Dave.