I mean he's probably the biggest streamer who focuses on crpgs (although he doesn't play them exclusively, he plays them a lot).
He voiced Arwen Merton in Solasta too. If you've played that game and PoE Deadfire, you'll recognise the Cog of Cohh in both games.
He's very supportive of crpg developers of all sizes and it's normally his playthrough they watch on release of a game for bugs and patches. When he played BG3 EA he got 47k people watching him at his peak. It will probably be even more on full release.
If his first playthrough of a game goes through without too many bugs it's a massive bonus to any developer given the size of his audience and how well respected he is in the general area of crpgs. If his audience enjoys a game he plays it almost always translates into an increase of sales. Like Blackheifer says, great advertising
