>Rather than building a principled broad competitor to something like Steam, you end up cornering yourself into a narrow, highly specific market segment.

Yes, that's the point. Not everyone cares about financial censorship, but the few that do will be your customers.

when you start talking about a business for serving “the few”, you’ve already removed the incentive for most entrepreneurs (unless those “few” are the extremely wealthy and you can charge them exorbitantly).