My wife and I also rejoined after having received/used the free nights certificates about a year or so earlier. We got the points bonus but no free night certificates. When I called they let me know we would not receive the free nights certificates because we had received them when we were members in the past .... one bonus per account ... unfortunately computers have long memories ....

Fair enough .... although disappointed to have not received the free nights, we are happy to have received the points bonus (which according to the "rules" they could refuse or even remove).