There's a long list of providers that come onto AutoTrade strong, flared out immediately, and then are pulled. Almost of all of these are pulled within the first month.
I've personally decided I'm not going to add a system to my live AutoTrade account until I've seen forward performance for at least 3 months in a demo account. I pretty much ignore it for the first month, because I know that most of the ones that look good when they are added have peaked and will never perform like that again. If you're chasing a quick $, you'll be adding these new and unproven systems to your live account, only to be disappointed again and again as they fail to perform as they have. You will lose money.
In my opinion, Myfxbook should start prospective AutoTrade systems in a 'proving' mode for the first month after they are added. Systems would need to perform within a statistically similar manner to their past performance for that month before they are added to the roster of live AutoTrade providers. This would weed out many of the dishonest or just plain poor providers as their systems would not pass the forward test. In this mode, the systems could either only be public to Myfxbook administrators, or they could be available only to demo accounts.