What are those store cards, that shops always tell u about?

Question

10% off etc, are they could.

Answer 1

IN UK they are a charge card that charges usually exhorbitant interest rates, way above even standard credit cards. They tempt you  with 10% off the purchase price knowning that most people won't pay off the full amount at the end of the month and will end up paying massive interest payments.

Steer well clear is my advice. They're a total rip off.

Answer 2

High interest rates and they are also bad for your credit rating.