If you could get a credit card where you can pay for your purchases in monthly installments without interest rate for 2 or 3 months but with interest rate for more than that, would you use it?
In the US, this is a pretty common form of financing for bigger durable goods (furniture, etc) - they call it "N months same as cash" but it's implemented as a credit card with a 0% interest rate for just that purchase for a limited time.
Off course, butb only when I can
make more by: Tell a friend, referral bonus.