Probably the same as what already happens with credit card data breaches. Stripe could decide to just start running cards, but it would have to test them as it

Probably the same as what already happens with credit card data breaches. Stripe could decide to just start running cards, but it would have to test them as it does not know how much to take from each. That would be short lived. Issuers, networks, etc would put an end very quickly. Businesses could somewhat easily switch over, they aren’t a monopoly, they’re just the easier option. They could be more subtle and just start selling data to advertisers, insurance companies, etc. This could increase their valuation by a lot, but idk how competitive they’d become. Every other payment facilitator can do that as well.