All fintech relies on two things: A bank and a payment network (Mastercard/Visa). This makes fintech an inferior product and most fintech I have tried have an abysmal customer service. Also, because fintech does its verification thing over the Internet, it seems that they rely more on their AI to block/ban people than a phone call. Fintech also seems to be more down to lick regulation, banks and mastercard feet at the expense of their customers.
This explosion of credit cards/offers/rewards is hardly innovation. It has already happened with banks (every big store has its own credit card) and it's usually a bad deal for customer as it requires "loyalty" to that brand.
That's it folks. The market has been cornered by a couple guys and it seems the regulatory barriers have been lifted high enough that nobody can enter again. Remember when MasterCard/Visa used to send these cards for free without any KYC whatsoever?