Some of you have written:
1) So far i have only made a few pounds (£) on Google play roughly £100 over the last 6 months.
2) Have made enough money for a few beers
3) So at the end of december I had near 120$. I was really happy.
From my point of view, creating software, which we like, is anything but a joke. Do not post free apps on Google Play, this will only do by big software house, inserting extra sales, so they as to be able to afford television commercials with famous testimonials.
P.S. When I will have published my first app, will let you know ... If I will be a millionaire, I will inform you from Hawaii
(sorry, my italian is vastly better)