I have a free very niche iOS App which has been free. Recently, I saw a big spike in downloads, almost all from China. Turns out many other providers of free Ap

I have a free very niche iOS App which has been free. Recently, I saw a big spike in downloads, almost all from China. Turns out many other providers of free Apps have been seeing the same thing. The most plausible theory I have found is the one mentioned in this article: a commercial click-farm that is using free downloads to "normalize" the look of the fake users. I have reported my concerns to Apple, but I also decide to charge 99c for my App. This will eliminate the bogus downloads (I have no interest in being a participant in a fraudulent activity), and for the few paid downloads I do get, I will have the satisfaction of knowing that the downloader shares one of my passions.