How many different merchants to do you deal with on a regular basis? What is the risk of fraud or of bad product and or bad vendors when both ends know each ot

How many different merchants to do you deal with on a regular basis? What is the risk of fraud or of bad product and or bad vendors when both ends know each other? Why introduce a 3rd party in those transactions that gives back a fraction of its fee to the payer? (5) Instead why not reward repeat business with preferential pricing? (not directly possible but attempted via loyalty programs that cost a lot to deploy) The credit is provided by the issuing bank (4). It can exist independently of the credit card network. And with any electronic means, 1 is pretty much a given. Credit 3rd parties still have a reason d'être if a solution that shortcuts VISA and MC when both ends know each other catches on. A Credit 3rd party is needed as an insurance policy when two unknown parties do a transaction; that insurance is bound to cost more than today given less volume; but it could be efficient if pricing would be market driven instead of diluted in 100-1 day to day transactions. Thanks to the down voters, BTW. Again HN is showing openness to look at things from a totally non conventional angle. I think I'll log off for good. So long, and thanks for all the fish!