The 5 point ad bonuses, I suspect, are geared toward specific users/specific user patterns. My wife and I both have mypoints accounts and generally receive the same emails on a daily basis, with the rare exception. Over the past three months, however, many of the offers she receives have not included a 5-point click-thru bonus, while the same offer I receive has. Same exact email, one with the offer and one without, to two different accounts.

I am not sure what determine the version someone receives.