Below are explanation and terms of a $100 for Discover More card.
IBD note: A promotional code DANX for getting $100 bonus after spending $500 in the first three months was reported on several online forums. Apparently, you can become eligible for promotion if you apply via apply.discovercard.com and enter the code.
Here are some citations:
chimeer on FW:
QUOTE
I recently saw a new offer code for this card in popular science $100 after spending $500 in the first three months. Expeireation for the offer is July 7th 08. Offer code is DANX
source: fatwallet.com/forums/messageview.php?catName=finance&threadid=798810&msgid=12162492#m12162492
dangtran09 on SD:
QUOTE
You can get $100 cash back after spending $500 within 3 months of receiving your card. Apply for the Discover More card using invitation code DANX to qualify.
source: forums.slickdeals.net/showthread.php?t=798889
Would paying college tuition qualify you for the bonus?