I kindly believe that 99% of such giveaways participants are not interested in the project and do that to earn some extra money only. True crypto enthusiasts mostly research, mine and invest in different coins as they choose only what's really interesting for them. Such activities are out of their interest.
Well, you can look at this one from that angle too. Interestingly, I still find such promotions very useful. Especially if they are somewhere of an average level of complexity. That is, neither super-complex nor super-simple.