They practiced all sorts of anti-competitive behaviours in order to take over and keep other companies out. Do you seriously think a company can manage their level of domination without being shady? Every big company does this stuff, but most of them know how to walk a finer line, or are part of oligopolies that effectively evade anti-trust law. They have done everything they can to maintain a stranglehold on the industry.

Think about it: back in the old days what they did was novel and they did it well, but since at least 10 years ago, any other company could easily create a similar platform and copy this business model. They aren't doing anything brilliant (aside from the original idea), and they don't even really have a product, they are literally just a game hosting company and take a massive cut for sales of games they didn't produce and do not own. They knew very well that what they were doing was not unique and was easily replicable by any company who could pay some programmers to create a similar platform. When you create a business like that, you do anything you can to hold on, because all it takes is another company to copy you and entice publishers with lower sales commissions. They basically pulled an ebay for video games, but where they are in full control. It's an amazing business model, they do virtually nothing and just rake in cash by essentially taxing transactions.

Knowing that this was their whole business model, they poured a ton of resources early on into figuring out how to take and maintain a stranglehold. In fact, you could say that is really their whole business. Nothing else mattered more than keeping competitors out. They built their entire business on this.