I find the equity curve of this account scary. It is very reminiscent of the equity curve you see on martingale or grid systems. It can go well for a long time, until one day there comes a loss so big it takes half of the account with it. How likely is that to happen here?

A full SL will result in a ~20% drawdown. It's not likely to happen but it will surely happen. My other Kangaroo account had a >40% drawdown a couple years ago when several SL occurred in a row, but it's worth mentioning that it's a cent account with very large spreads and that other customers running the EA didn't have all the SLs my account had.

Anyway, I wouldn't worry about it too much seeing that the system is no longer available for sale.

finally the first drop :)

Was bound to happen at some point, I'm a bit impressed it took this long. Still, drawdown less than 20%? Not bad given the other stats.