The amount of airdrop can not determine the final revenue. I think the quality of the airdrop project is the key.
Yes and no..Absolutely quality is better than quantity but in crypto world some projects with an apparently good quality fail, even before its ICO finish or its official launch, and others project that apparently has a very poor features, survive the ICO stage and a lot oftime after that, is imposibble to know what will happend in the future but be part of various projects airdrops increase the probability to get coins that has some value some day and we can exchange it