If you're going to open up a new credit card, you might consider one that has better rewards than you currently have and/or an eqvalent sign-on bonus or better.

To me, it's a risk/reward decision. But $100 off does seem alittle low reward to me. I just opened up a one that got me a $200 sign-on bonus and 0% APR for a year.

Just my two-cents.