I believe that the majority of card fraud is things that can be liquidated as easily as possible. eg. quite a lot of reports I hear about in the UK is prepaid phone top-ups - I think either the voucher or the use of the card is sold to somebody to top up the maximum allowed. I presume the phone company reverses the top-up when the fraud is reported or just doesn't bother - I very much doubt that anybody follows up with the user of the phone.

Another one is full-fare (flexible) airline flights - apparently because with some companies you can get a refund in cash even if the tickets were purchased on a card.