Another rhythm game that has a lot of vocaloid songs+more. It's also very popular in Japan. I hate to say that but Project Diva is pretty dead now and even if you try to stream it's likely that only a few people would watch it, thus reduced revenue.
+ you may want to not stream the audio I think, SEGA is very strict about that, after all it falls under licensed music, therefore a risk of demonetization
I get it now. So unfortunately it's impossible to get rich playing Project DIVA which is what the replies in my post indicate.