With a paid version of the app or an in-app purchase, sure. Sadly, some devs only have an ad-supported version. Apps that waste my screen space and download quota with ads just aren't worth it. Either the ads go (with AdAway) or the app goes.
Also - downvote if an answer is offensive or inappropriate, not because you disagree with an opposing point of view!
As for the downvote, you're right, but it wasn't me. I don't have that ability yet.
Downvote comment wasn't directed at you in particular!
It takes a lot of efforts to become and Android developer and create content in general. You should respect that.
Your best bet would be to contact the developer and try to see if they would offer such a thing. They may even be willing to make a one-off exception for you.