Maybe the price can easy to dump because the project dont pay to get listed on there.
Based on the fact, As a Trader want to get profit can Buy on rumors and sell on news. This is one of the fundamental Analys.
that's more precise, if there is a good rumor market will give positive respon by buying coin although finally the fact unlike this rumor. buying on rumor and sell on fact be basic rules for every traders. fomo and hype be the reason why price increase if they see project will listed in binance community vote
and most of the time, the vote is coming from those holders. so once their bet got listed, they can easily dump the coin without considering of anything. because the main reason why they wanted it listed is to discard it as soon as possible. and also, since they don't spend resources, it is easy for them to see the project fall. this case doesn't happen not only in Binance but other exchanges that are holding free community voting. so really not an isolated case for BNB