I guess this article could be viewed as a follow up to my previous article asking "Why do all Expert Advisors Fail?". In that article I suggested that some or many EAs didn't actually fail at all, but instead were discarded or written off by their users because those users had a completely different level of expectation to what the system would be likely to deliver in reality.
Let's face it, wouldn't it be fantastic if you were to buy an Expert Advisor, deposit $10k into an account, and the EA never had a losing trade? Inside of a year, your account balance might be up to $20k, or $100k or even more.
Sadly though, life just isn't like that, and stories like that very rarely actually happen in reality.