I usually don't worry about them, not really expecting them to turn up given what a mess this promo always has been in the past, and they've always turned up. I got an email acknowledgement that I was due 256 Avios for yesterday's purchase. So signing in to your Iberia account, clicking through to the Iberiaplustore then clicking through to Groupon, enables the system to track that you have signed in through your account if you then click the link in post #503 .
I am pleased to have secured one of the 2,000 Avios package this time.