FUN FACT: Since July, Rocket League has welcomed more than 8 MILLION players. Thank you so much for your support!
— Rocket League (@RocketLeague) November 30, 2015
Well, that's certainly something. A good chunk of that is probably the PS+ crowd but still. I think it currently has between 30k - 100k concurrent users.
If you demand respect or gratitude for your volunteer work, you're doing volunteering wrong.