I think this has more to do with the setup, I'm pretty sure it's possible to add a tracking pixel to their payment page, which will stop paying users from seein

I think this has more to do with the setup, I'm pretty sure it's possible to add a tracking pixel to their payment page, which will stop paying users from seeing the ads. I agree that this is the annoying part of it at least for me. Seeing ads for stuff you already bought.