I’m the PM on Chargeback Protection. Startups told us they don’t want to deal with the hassle and unpredictability of chargebacks; that’s why we built this. Happy to answer any questions you have.
0.4% is an extremely steep price for a company like mine doing over $2.5m in annual turnover (saas) which has a very low fraud rate. I actually think currently we pay less than that by doing nothing (meaning letting Paypal handle it, and losing every case).
However I'd gladly pay a few thousands per year for it, or be able to pay it on selected transactions (only US for instance).