The last thing you want to do is get tricked into racking up debt
on a high interest card just to get a few dollars back for your purchases — it's not worth it.
Since most people will charge more on a 0 % interest card than they would
on a higher interest card, you could end up with a higher balance after the end of the 0 % period.
Typically these special interest rate offers will be in effect for 6 months to 1 year so there is a large opportunity to save some money if you are currently carrying a balance
on a high interest card.