1. Blocking coinbase would be anti-compeitive behavior which are totally different laws.
2. Valve is not publicly traded so we cannot do a detailed comparison, but all indications show Playstation is a larger gaming platform than Steam. Steam is not "the largest game platform on the planet".
3. Yeah I agree that strong legal regulations for the payment processing industry would be good. I think a public electronic payment processing system would be better, and wide adoption of a crypto-currency based solution would be the best. My trust in governments and central banks to handle monetary policy is very low. My trust in private for-profit companies to handle payment processing is even lower. It's one thing to do well over a few decades, and another thing to do well over a several centuries and real economies operate on a very long timescale.
4. It's disappointing that we treat NSFW as such a taboo.