Exactly the same story here. When I was 12 or 13 I tried to use bots in Tibia to make some money on selling gold, eventually leading me to the path of trying to write my own bots for different games. I had one of the first proof of concept bot for Path of Exile which I reverse engineered myself.

I think it's really a great way to get into programming, since it's SUPER rewarding to make the computer game work for you especially if you can sell some of this work afterwards. I know for some people it can be viewed as a shady practice, but I regret nothing ;)