How do you handle Stripe disputes on a subscription or course business?

I’m launching Flatfight tomorrow, a tool that fights Stripe chargebacks with evidence from your own product (logins, usage, lessons, support messages) for a flat $9 per win instead of a percentage.

Before launch I’m curious: if you sell software, courses or memberships on Stripe, do you fight disputes or just accept them? What evidence has actually won you one? I’m especially interested in “fraudulent” disputes from customers who clearly used the product.