There's a badge (necessary to plat the game) for playing an event with 50k players on XBox and PS3. So far, on the PS3 we didn't get more than 45k players and EA decide to give us some motivation:

Let's Try to Get the 50,000 Riders Global Events Badge! | Facebook

All on your board!

Hell yeah! Me and Tane will knock this out of the park. Count me in.

Come on people! Show more love!!! lol

Reminder:

Join the main global event this week for the 50k badge and the lvl 11 gear.

I will be doing this tomorrow, I was worrying about this achievement

I already played that event when I got SSX yesterday, so I can't help =( but technically I already did =D

Wow that's a serious way to get a plat!

Nice works guys! Yep! That is serious and EA did a good job in promoting the event with some upleveling stuff.

awe man that means if i get the game in a few months i won't be able to get the achievment.

13,000 riders so far on PS3... so some way still to go