Im using this tool and it is very handy. It helped me to figure it out that my antivirus program blocked my mining. Very good to get the report of your mining status. Because of the antivirus blocked my mining the process was always stopped, but this program always restarted the mining process so I didn't loss money. Anyway if it is that easy to do this kind of program why you are not doing it for yourself and than you don't need to be worried about the OPTIONAL dev fee. Anyway Robcsa did a very useful script just give it a try guys. He spend his free time on to make this program so I don't see nothing wrong that he built in this dev fee, it is optional and actually it's helping me to make money more efficient so I don't mind to give the dev fee. Off course is up to you guys.