Ive been using EA's for around 6 years now. I've built a few from scratch but most of them I subscribe to. Realistically you can make money from any of them after you have done the testing and tweaking for it. Just focus on a big enough sample size like more than 100 trades and 1 time frame with 1 instrument. I've got 7 that consistently make me money but there is no way i will share them. When ive made a billion then ill consider it. key is lots of testing as they rarely come out of the box so to speak working the way you want them to.