That's why I hate EA sellers.
As I always say 99% of EA sellers are scam and I still have to find the other 1%
I don't run any EA in my live main accounts because I was unable of program or find any EA reliable enough to be used in live big accounts.
Profitable ? yes they are a lot but I still didn't find any who don't give the profit back in short time.
Of course you can run some martingale or grid on a mini account but it is gambling, if something goes wrong you will loss your account in short time, I had to refund one of my test mini accounts 3 times in one year.
I only do manual trades on my main accounts and I doubt that any EA will outperform a trained brain
Anyway I don't give up and I am still programing and testing. but I fully agree about the sellers.