Unfortunately it inevitable. If a publicly traded company exists, it will have to extract more and more and more until this kind of rent-seeking model happens. And if a company is private, it will eventually go public. And even if you truly believe in a company's owner to not sell out, eventually they will die and the company will go public or get sold. Eventually, money always wins.
But if a troll blocks everyone that down votes them, eventually no one will be left to see their stuff. It is a self solving problem. On the other hand, a troll that you block can interfere with your stuff being shown to others depending on the sorting algorithm.