The giveaways are not fake, but you are competing usually with 300,000 other managers and sometimes more. We did do one giveaway which rewarded the fastest players who redeemed a code. 10,000 codes were gone in less than a minute and we had people claiming it was a scam as well.

We have a simple piece of software in which we enter a post and have it search it for all the correct answers (without taking into account duplicate posters), and then have it show us X random winners from the comments section of a post. For Twitter, we do it manually, but we still choose the winners at random.