So I will need to go back and read their whitepaper, but some ICOs don't have any stipulation on when or how much of their own allocation of tokens they can sell after ICO.
Though the likelihood would be that they simply liquidate the ETH that was raised from the ICO.
What are your theories on the sell-off of PLBT?
Oh, you meant that they sold their own reserve of PLBT. I thought you meant that they dumped the ETH/BTC that they managed to crowdfund during the ICO (like many other ICOs are being accused of doing). I guess that could cause devaluation, yeah.