Stripe is currently passing on these revenues. Stripe has been hostile to these revenue streams for more than a decade.
You seem to think their behavior will change after an acquisition. An acquisition that is also a (dangerous) market consolidation. I don't think they will.
How is PayPal not subject to MC rules when MC is used as a funding source for a PP account that purchases cannabis-adjacent services? Is it magic? Is it some plausible denial thing?
Also, if their only motivation is money - and lets assume that is true - then taking a few billions in high-risk money puts their other even-larger billions at risk.
Do you see that? Yes, they could get new revenue of ~30B adding to their existing ~5B. And assuming several billion in high-risk (4B?) now the question is...would you throw away 4 dollars of your 40 dollars to reduce the risk of the remaining 36? While also knowing you can grow into other lower risk markets? Would you throw away 4 high risk dollars to replace them in two years with 4 new low risk dollars?