Marriott Rewards - Bonus Bucks good at Courtyard?

Can someone tell me if there are any bonus bucks that are valid for Courtyard hotels in circulation. I have a 7 night stay over xmas I believe I could use up to three for that stay.

Thanks

There are, but they are only $50 BB. And usually earned at either, Courtyard, Springhill or Residence Inn. Sometimes available on Ebay as well, but prices have gone up so much as to make it not worthwhile there.