Mostly agreed. I don't know anything specifically about Stripe, but I did work on fraud prevention systems for a major company. Being able to aggregate signal

Mostly agreed. I don't know anything specifically about Stripe, but I did work on fraud prevention systems for a major company. Being able to aggregate signals across multiple customers is a massive help in fraud detection - in terms of signal quality, bigger is better here. As a simple illustrative example from the article - a large provider will have history for email addresses and street addresses. Maybe they've seen lots of orders in the past from a given sketchy email address paired with a reshipping center that were all valid, which moves the risk of a transaction from "dodgy" to "probably fine". They'll have historical information that an individual merchant just won't have. That said, at some point you're going to need to have your own specialists involved, because the big providers aren't going to have the specific domain knowledge about your products/users to make good decisions around the margins. Plus you'll probably want to define your own tolerance for risk.