1 Million Sold on Steam! Coming to SteamOS/Mac later this year! 48-Hour Steam Sale at 10% off! http://t.co/KOJV2v3IZB pic.twitter.com/e5Eikrnlbg
— Rocket League (@RocketLeague) August 27, 2015
Must be because it was free with PS+.
If you demand respect or gratitude for your volunteer work, you're doing volunteering wrong.