Don't want to sound like an asshole here, but i don't see another way:

Are you mad because a trader saw an oportunity on a free and open market to profit from the spread? I am not familiar with what this project is about or how it works, but once you put an asset to be traded openly in a free market, well... thing like this will alway happen.

Good traders always see these oportunities, and they will always take advantage of what is called "market imperfections".

So, instead of blaming the guy that is profiting from this opportunity, just focus on adjusting your distribution model.