What makes the spammers choose the racing section?

They used to post in the Press Release section. That was blocked so now its in the racing sec.
My question is why did the Admin post in between all the spam and not do anything?

Good question. I must take off about near a dozen a day. I don't have the ability to make that section a Moderator approval post. I do my part, up to the new Admin. to take care of the rest. :(