I read a lot and my brain works in concepts, not so much encylopaedic/photographic memory. I read something about some kind of teaser/carrot code one could get if one went to <whatever> site and had at least some number of posts. It sounded hoaky. You pointed out that the user name included "just gere for the activation code" or similar and that's what triggered the memory.
Yes, Foo and Bar and foobar have been generic variable references for decades and is why I used it there: it was a stand-in for a site i cannot recall.
--HC