Has anyone else done the slightly odd survey about over the counter medications today, which asks you to sign up to do an SMS task? It's not immediately clear from the instructions at the start of the survey, but it says at the end that if you don't sign up for the SMS task, you don't get paid for the survey (think this should be made crystal clear at the outset, personally!). I've followed the instructions to do the SMS thing but have not had the return text that it said I would get - just wondered about others' experiences of this one.