After Develop App OR snipped Code You will have three Types of pricing:
1.
Free :You Can Make App OR Snipped Code Free for Vendor So when he Added it to Shopping Card And Checkout He will complete Order without Make payment.
2.
Fixed Pricing:You can add Fix price for your app Before publish it and also make some options and add For every option private Price. also You can Discount to it from discounting Page.
3.
Recuring Payment:if your app Need to recuring payment so the vendor must make payment every month or year you can enable recuring payment befor publish it and select period type and enter priod price.
INFO
Any payments made by the merchant will be transferred to the platform account So Platform Team Will trasferred your payment to Your payment method after discount the percent As that writes in condition and rules Of platform.