https://www.rocketleague.com/news/rocket-pass-launches-on-september-5/. Not so scummy as first thought. 10 keys for the premium track, can earn 6 back if you get all the way to level 70 on it (devs say about 168 hours to do that), can earn all 10 back if you go beyond level 70. So free if you play enough. Rip my free time :(.
@Xdqwerty, to answer your question, they're a fusion Brit-pop/J-pop/electronic band with a woman vocalist. Flamingo is hands down their best known song but they've got a ton of other really good songs