If you are signing up for Microsoft adCenter you might have trouble tracking down an active 2008 code. Most of the promotional codes are expired. MSN once offered $200 for every signup! But now they only offer $50.
Microsoft AdCenter $50 Credit
Coupon Code : OMW1008
requires $5 activation fee
Hint: To find more promo codes use Google’s Advanced search. Refine the results by date and only include new pages within the last year.
If you have any other codes or promotional links leave a comment for the other readers.