Cashless payment (bank) of the application through a promotional code?

Question

Google Play

Good day.
There is a paid application in the market and there is a free analogue with limited functionality.
1. Can I accept money from a client by "payment" or cash and give him a promo code? is it a ban?
2. Can a promotional code give a 100% discount?

Answer 1

Read the rules, you can not accept payment past the "cash".