Today I was notified that I had sold one copy of e-book in Canada last month.
I was so happy that I told my colleague sitting next to me about it. He was surprised by my excitement because the profit was less than the price of an espresso. I explained to him that since I am the only person promoting the book, it is really hard to sell and thus every copy counts. In addition, it goes far beyond the financial benefit (to be honest, not really my main goal). I am happy that someone is interested in reading my book and sharing my experience to help others is indeed my main goal.