I'm just hoping you're not one of those people.

If you'd peek at my profile, you'd notice I've given away games (Not as many as I'd like, by any stretch, but I do what I can with what I have) that aren't exclusively bundle keys. Many of them are group giveaways, yes, but again, that's not exclusive. I've won 72 points worth of non-group giveaways and have given away 152 points worth of non-group giveaways solely by profile stats. That's not including other things I've popped onto the forums to give away like Far Cry 3 (non-steam) and the rest of that Microsoft Bundle and something else I'm forgetting.

I agree on the point that there are people who try to take without giving anything. They're not a part of the community and the term leech is fitting there. However, I must state that I don't believe comment count or amount contributed are the most important factors in determining membership within this community.
I would consider someone a member if they give when they can.
I would consider someone a member who does not exploit the system and enjoys the games he wins.
I would consider someone a member that comments in a giveaway when the creator asks it of them.
I would consider someone a member who doesn't beg or spam or abuse steamgifts.

I am a lurker. I watch the forums. I am generous when I can. I enjoy the games that I win (even if I don't play them right away due to the giant backlog I currently have). I am a member of this community, and so is everyone here that simply has common decency, whether they have 1 comment or 1 million, whether they have no contributions or Crossbourne levels, whether they're CG himself or someone who signed up today.

That's just my opinion, and I apologize if it comes across as ranting or defensive, because I definitely do not mean it that way.

(Also, sorry for the repeated necromancies)