There are entire organized crime rings and many, many individuals that specialize in merchant account fraud. In the early 2010's people were creating stripe accounts and processing up to $100,000 fraudulently. I'm not sure who ate that, but it surely had an impact on their bottom line. I had screenshots from Alphabay of over $5,000,000 in fraudulent charges on merchant accounts. If Stripe only makes 1% of transaction cost and has to eat the fraud then they'd have to charge $500,000,000 to just make up what was posted in a single "mastermind group". That is crazy...