Telika: These spammy threads are indeed stupid, but I doubt I'd be making giveaways at all if there was a subforum dedicated to them. My giveaways threads were never adressed to (or meant for) the kind of people who'd specifically seek them, or who come specifically for them.
I'd also not participate in them either, as I only take part in a giveaway if I stumble upon an amusing one.
Plus, as often mentionned but it seems to be worth repeating, many giveaways (including, often, mine) are a pretext for discussions and thoughts exchanges, making them legit threads by themselves - with interesting "in" and "not in" posts. A giveaway subforum would kill that possibility, as these threads would be seen only by people merely seeking to grab free games. Or would prevent a nice discussion to include a little amusing related 'gift' in the background.
^This. I see giveaways as a way to give back to the main forum community. So it would be bad to separate the two.
But it would be nice if people starting several giveaways in a short time would do so in just ONE thread instead of opening a dozen threads like ne_zavarj did. Because if half the page is taken by threads opened by the same person, it really starts to swamp out the other threads. And that is kind of annoying, even if the intent is good.