I joined this the last time they did a promo, and completed a few surveys, with Avios credited promptly. Then, out of nowhere, I logged in to do another survey and found that I was 'permanently banned' for violating their terms. Absolutely no idea what that's about, and emails to them looking for an explanation have gone unanswered. I'm a UK resident, BA Gold with a UK based BA/Avios account.
Anyone else had issues?