Hi, If they are going to give you your money back (and by golly I hope they do as I'm bored hearing you talk about it) then they need an income stream. If they sell 10,000 licenses for a year (which I think would be a remarkable success) that would be 500,000 euros. If you're trying to pay 10 engineers (e.g. for security updates, hardware adaptations and a newer version of Android) that's not a lot of money for salaries plus taxes etc... plus development hardware plus tablet refunds. 50euros seems cheap and I hope they do well enough to make it sustainable (and refund you your tablet).