I'd not trust them. The expert is overoptimized on historical data and won't show the same results in future trades.
Most commercial EAs are highly over-optimized, to show unreal results (=steady equity curves). The more optimization you need to make your EA profitable, the less chance it is actually successful.
LOL. I can make back tests like that too. 10k to billions. Although this BT is a joke it is performing extremely well live. Today alone it was good for over 500 pips on 3 pairs.