Bat for Ad space in App

Good Morning Guys <3

First of all. I am a small indie game, app developer and content creator with around 40-50k downloads for my apps so far. I got now an offer from one of my users.

He want to book one of my banners inside my app for his projects. He offered me to pay with Paypal or Cryptocurrency. What is the best and easiest way to get the bat into my Uphold wallet , because BAT is currently pretty low so it would be my payment choice.