Yeah I think you are right, also another way they could prevent dump is to lock up some of the tokens if its more for instance that for bounty reward or better still introduce the buy back strategy to help save the coin from been affected by the dump.
and what is often wrong in the understanding of people is the bounty hunter as the cause of the dump, even though this is a big mistake. because the allocation used for bounty is not much at least 2-5%, so it is very unlikely if the percentage is the cause of the dump after listing on market