At first, I thought your post is about promoting scammy/low-quality project but I'm a bit disappointed. You know that only few people will gonna join if the allocation is small so this might be the factor that some bounty hunter thinking. With only few participants then the bounty is quite enough for each individual. And also about the airdrop, 8$ is good for free money. Most projects doing airdrop and promising huge amounts turn into scam because who is in the right mind that will giveaway huge amounts of token while they are running a token sale? That is a bit unfair for investors that will gonna risk money for the project itself.
If the bounty already has the value of the token then the hunter will invade and many people will join in. I think it's natural because the hunter is promoting more promising, including me who joined the CMA campaign and had thought that the project could be money and real after I received the token the token has no price on the IDAX exchange,