Limiting is tantamount to saying that the ICO will surely a success and to limit the dump, they will release a small portion of the coins or tokens.
It does not work that way, most ICO prefers a lot of participants so they have better exposure, bounty are compose of different task to spread in the crypto world. The only reason why people complain now is because no one is buying and bounty hunters are dumping, this also affect the bounty hunters as they will receive a lesser value than their expectation.

Let's go back when the market is fully recovered, we will see that bounty has a little effect or no effect at all.