In all honesty I do know of some who owns multiple accounts (perhaps 2 or 3) and when such sites makes a giveaway and that said person is able to get his own copy he will try to grab another just to giveaway to another person who really wants the game but did not manage to grab a copy of their own. Such multiaccounters did it for the benefit of others which can be said to be a good cause. While we have others who just goes for their own benefits.
I did try on a site that awards 5 points for daily logins of which can be used to enter for raffles of games (Nothing of big titles, mostly bundle leftovers). After 1 week of managing 2 accounts I simply gave up everything. Wasting too much time. Imagine, account A -> Login, enter raffle, logoff. Account B -> Login, enter raffle, logoff. Just these simple actions actually already took 5 minutes!
Imagine if one needs to do something like that here for community raffles. Login -> click forum -> find post -> quote and reply post (while trying to make sure that they don't give out details of them multi-accounting?). Such conscious efforts how long does that take? At least 5 minutes per account? Say one has 6 accounts trying to get games from some gifter will already take 30 minutes. Plus trying to navigate around other areas of this site to also enter the public giveaway? 15 minutes per account? 6 accounts = 1.5 hours daily at minimum. Sometimes with no guarantees of getting something? Isn't that too much a good waste of time?