A few thousand over the course of a few months. The first three months were working out really good. But than it dropped to a fifth of the previous month and it went downhill from there. Anyway. It was still worth it. What took most of my time was setting up the store pages. (Which I couldn't look up by myself because I didn't own the device so I could not access the store at all. I didn't know the ratings on my apps either. Or the ranking in the store.)