Sparks indicated just recently a limit of "31" Marriott certificates to be purchased. Upon ordering and attempting to find the 25% discount, - The rest of the story:

" Well, there are a few points to hit. To get your egates rebate, you must use your ebates email address. I see on your order that you used your aol email. Also, the rebate doesn't count of the purchases of gift certificates. If you have any questions regarding this, please contact ebates customer service at <A HREF="http://www.ebates.com"" TARGET=_blank>www.ebates.com"</A>
Customer Service
Sparks.com