How would I ever know if the rule I've built is too constraining, or too loose in accepting payments?
Payment is not exactly an area of my business that I want to do a lot of trial and error..
If you do want to write custom rules on top of what the models are doing, we've actually built in a testing interface to the rule creation process. When you test a rule, we'll actually simulate what the rule would have done had it been active for the past 6 months. Using that information, you'd be able to tell the # of legitimate, fraudulent, or already blocked payments that would have matched the rule & make a decision on what's best for your business.
That said, we're looking to make our opinion on a given rule more clear (rules are still in beta) and would love more feedback on how we can make this better. Feel free to drop me a line (tara@stripe.com) if you have feedback!
That is slick.