It's probably a ton of bounty hunters just dumping their tokens on COSS EXCHANGE because that is what most bounty hunters do, dump at any price. I never dump my tokens when I receive my bounty as I know I would be selling myself out too cheap. Anyway I never joined the VZT bounty program as I found out about the coin on COSS so I entered the trading contest there and trying to win a prize and I will hold them till they gain a really decent value and grow with the project.