Yeah, they've never changed that NPC's text since the first weekend the race was held, which was the only time they gave out prizes. They really should - it confuses a lot of people. No prizes were given out for top 100 times this weekend, I'm afraid.
As long as they don't fix the top 100 list so that the top 100 unique accounts are rewarded instead of just 10-20 players then they shouldn't be giving prizes anyway.