HereForTheBeer: Hmmm, so those rep-bump suggestions come from the observation that the first post in a giveaway thread (from the giveaway-er) almost invariably leads to a "highly rated post" and thus a boost in rep. And the giveaway will often - but not always - come about after the giveaway-er purchases a game code for gifting. So from an observational standpoint, that would seem to be a possibility: pay money for a code, give away the code, and then gain rep means that giveaways are held in order to increase the rep.
I think it actually more comes out of bitterness and obsession that "Person X's rep is higher than mine even though I think I helped out more people and have been a member as long as they have". For example, if I believe I'm the greatest thing for this forum since System Shock 2, and someone else has higher a rep score/social reputation than I (even though they had the same join date as I did, or even joined later), then in my mind, it
had to be because those people were cheating or gaming the system... (Regardless of anything
I actually did/didn't do to warrant a poor reputation.)
HereForTheBeer: Though I wonder what the reality is: does anybody actually make a giveaway with the primary purpose of increasing reputation, or do they come from a bit of altruism, wanting to share the experience of a favored game, or simply some old codes sitting around unused?
I don't doubt that people do/have done/are doing that, but we've also seen many giveaways here that are exceedingly generous, at extensive cost to the person hosting it. Some of them come with reasons rooted in personal stories and experiences that come across as genuine and sincere (of course, they could also be fake, too). Sure, some of them have likely been to get rid of old codes, but I personally don't believe that they were done solely for the reason of gaining rep.
And in the end, even if they were, the person hosting it still giving back to the community. If a person really were focused on getting +rep, they could still easily (and more cheaply) game the system to get it through alts.
HereForTheBeer: <puts down pipe, pours a brandy, and considers suggesting to the hot brunette in the 2pm Psych 215 class that she come to my office after-hours for "extra study">
I hear the oral examinations in your class are quite uplifting. Some would even say, climactic.