Rival Classic #6 is broken but an easy way to get credits.

It's supposed to be a drift event since earning the bounty is based off drift score but for some reason the LB rankings are based off lap time.  Bounty on the #1 player was 50,000 and they only scored 78 drift points.  You don't need to beat their lap time, you just need to get a higher drift score.

If you're a VIP and want some easy credits...