>That's the same thing that would happen if nobody downloaded it for free but only a few people purchased it.
Agreed. In that case, I think it would make sense to conclude "there is little to no interest in my app," instead of "people want my app but would rather not pay for it."
> If sales don't increase, you've worked hard and not been compensated.
That's the same thing that would happen if nobody downloaded it for free but only a few people purchased it.