Yeah. Let's say you raced your first GP and came out of it with 35 coins. No unlock.

Second GP, and you earned a perfect 40 coins this time. OK, that's 75 coins, so here's an unlock.

Third GP, not so hot. You only pocketed 25 coins. But, hey, here's another unlock. Because 25 + 75 = 100.

Here's another one.

You have exactly 49 coins. You enter a GP and come out of it with 40 coins. That's 89 coins. You got an unlock. Race another GP, get another 40, now we're at 129, there's another unlock. Another GP, another 40, now we're at 169, another unlock. Another GP, another 40, 209, another unlock. That's 4 GPs in a row, 40 coins each, an unlock each time.

Also add the fact that unlock notifications stack. If you did a full-on 32-track multiplayer versus session, you'll likely accumulate enough coins to unlock 2 or more parts. When you get your notification, you're only going to be told about 1 part. Until you go and see what that part is, the game won't tell you that you unlocked any more. So, you may go race a single race, get a notification, and think, "holy hell, how'd I get 50 coins in ONE RACE?"

See?

This is why I think people are confused.

http://www.steven-chase.com

http://www.megamanmonthly.com