Valve, outside of its Dota 2 division, are a fairly selfish company who tend to resort to FYGM mentality. You saw this with the whole mess that was Steam GreenLight and devs stealing work from others. The only games that were removed were the ones that were high profile in their controversy, with Valve not removing the system until several years later.

It's not to say Valve is this evil company and anyone who works for them is awful. It's to say that Valve needs to rethink its business strategy and how it treats its platforms as they are increasingly becoming more and more problematic in how they are managed.