I personally discovered BitcoinTalk because of one of these giveaway threads, and whenever I introduce people to cryptocurrency, I tell them that if they want to start off without paying money they should probably look up "giveaways" of certain coins on Google, and Bitcointalk is usually always the first result. You may have a personal grudge against alternate coins and that's understandable as there are many so called sh*t coins out there but you should let the market decide which coins will succeed and which won't. Not only this but you're going to drive your audience- which you acknowledge is big for this kind of thing- to other forums made either specifically for giveaways or those who are competing with you.