giveaway and contribution level requirements

no it won't generate additional CV.
giving away non-bundled games is fastest way to increase CV.
advantage of level giveaway is to entrants as they get higher chance to win the game. ( some can argue high level giveaway means less chance of winner to be asshole)

the advantage is , from various community-experiences, that the probability that get a winner, that knows how this site works, knows how to handle with gifts, keys and links, knows how to mark something as received....could be higher.

( of course the winning-chances are also higher for those that enter a GA with a higher lvl, but there are other ways to do this)

No it won't it's just to kind of weed out users so that in case you have a very expensive gift and want to give it away, but say you don't want just bots, scripts, leechers entering you raise the CV level requirement and usually above 1 is good.

You don't get any additional points, but I think it's still worth it to give to those who give back, but that's just me.

To clarify and stop spam/flame . I 've updated my question and yes i meant CV (Contribution Value) . Thank you kraken9 for pointing at that.
And thanks for all input.