Honestly, if you’re paying to support the dev, ads won’t even needed to be added to the app.

While I do like Sync and Laurence, your argument is far from the truth, there are people that will think about paying just to remove the ads. Supporting the dev will be just the bonus there.

Edit:

Also valid to say that a smaller user base don’t suddenly mean that you have to charge more, that thinking is, in all honesty, mind boggling to me.