Best Western Rewards - Downside to switching to a racing membership?

For an upcoming stay, I noted rates for "speed rewards" members. Turns out this a free program from BW for racing fans- which they themselves point out is free. It appears to be the same as the regular rewards program, except that it would qualify me for this special rate that is $10 a night cheaper. Is there any downside to converting a regular membership to this "speed rewards" membership? (No points in my account...)

http://racing.bestwestern.com/speed_rewards/levels.asp (describes speed rewards)
http://racing.bestwestern.com/speed_rewards/questions_and_answers.asp (tells me how to change over my membership)