[NotPaidToPost]

What he's saying is that currently doing nothing costs him less than what paying 0.4% to 'insure' transactions would, so why bother with insurance?

Ultimately established companies know how much chargebacks cost them and thus whether this product is worth it (= costs less).

[globile]

Another thing to take into account is that if you're not using Stripe Checkout now, you will have to migrate to it, and since Dynamic 3DS will be used to filter and "secure" potential fraud, you will probably see a decrease in conversion rate.