Technical bad plugin

This plugin looks like it was made just for Bluesnap without love.
Technical bad Plugin.

1.Plugin slows down the Website!
https://gateway.bluesnap.com/js/cse/v1.0.1/bluesnap.js?ver=5.2.1

Why you dont put it in the code? Because you are to lazy to update the plugin?

2. If someone wants to order and payment is refused… because of not enough funds or other reason, the order is processed, instead of keeping the customer on the payment checkout site.
This is a total revenue killer.