I owe FT much more than I've given back. Above being an FT member, I've moderated OMNI (when it was moderated, along with TB member ScottC and fellow candidate skofarrel) and I'm currently the US Airways forum (the latter for, oh, probably 5 or 6 years, at least).
I've sprung some decent deals, taken advantage of some others, been to a few Do's, hoisted a few drinks, won (and lost) a few friendly wagers, carted Freddie Jr. about, and a slew of other things.
I'm with Mr. Coins on this: I don't tend to think of these things as currency for a subsequent action, and I'm with Cholula in that FT has given me waaay more than I can ever give back. But I'm trying (ergo sum, among other things, running for Talkboard).