When airdrops first starting coming into play, I unhappy with them but since then places that have airdrops like in chat rooms and telegram then they are no longer that bad. They do have a way of promoting a real service (which few airdrops do) but many people freely promoting the ico/airdrop don't look into it nor use them. Tron10 tokens are used often to airdrops, rain and snow onto members in channels/rooms. There are people making money just be apart of these communities rather they talk or not, doesn't matter. So in this case, the developer gets screwed if these bots or bot like people are not doing the free promotions.

Personally I'm on a the fence but I have been learning methods used by people to find legit practices like getting large airdrops for those people to sell,brings up size of decentralization and the devs get people coming in during the ICO phases and if they become a higher give or use token after ICO and the price is no longer locked, then there should be a higher chance of continued user use/trading/buying. So, I don't know which way to fall.