I'm sure glad this was in MilesBuzz. I had the same question, having about 100 'whatevers' and wondering about their value and how to use it. I too sort of enjoy seeing the work of the marketing pollers.
I was here at FT when the SPAM board was created to remove what was then regarded as 'spam' from BUZZ. Since then I have never had a reason to even once look at what is posted there. I came across e-Rewards completely independent of FT. I don't consider it to be a topic only appropriate for SPAM.