Yes. a few, Ironmouse even hired skinwalkers for her 3D to dance. She is obsessed with having her model dance for some reason.
They also started having a partnership with Brave recently where they were invited to use their studio
There is a playlist of 30 music video/covers on their VShojo main channel. So they do go out of their way albeit minimally to promote their talents music.
ANNNND somehow Hame Hajime is one of them.
Not going to say anything about the Skinwalkers because she cant dance for obvious reasons
But its funny to see the two business models in vtubing that throw money at everything together