Is your cashback card a rip off?

Elaine Thompson/AP/Press Association Images

A new survey has revealed that cashback and reward credit cards are on the march. Some 42% of credit cards now offer some form of reward incentive, compared to just 27.4% two years ago. There is a huge variety on offer, with 22% offering cashback, 68% a points or voucher system, and 10% Air Miles.

However, the study found that some are decidedly less generous than others.