Some advice I got a while ago about detecting fraud through stripe is you should probably train your own fraud detection model if you’re serious about limiting it and have enough volume. Even something like a simple logistic classifier would work. Stripe radar isn’t tuned to the specifics of your business, and there are other signals you can account for (like which products they’re buying, how long it takes them to buy after opening your site, etc). Custom Radar rules work to an extent.

I get that a lot of indie businesses probably don’t have the resources/want to do this, so there are solutions you can buy, but they’re expensive and mostly targeted at high volume merchants anyway. Maybe stripe launches a fine-tunable radar product someday?