#1 Enworld Jerk™
I think that even they would welcome that. It seems like they are constantly facing some kind of financial apocalypse or another, so the free exposure would be accepted without their historical legal action.[*} I mean, maybe also Palladium. Not sure where they are now, but I could see old-school Palladium being the kind of company that would get very protective of their game being streamed online.
That being said, I don't think any of these streams are even jokingly considering a Megaversal game.