Sorry for all these questions but I'm really wondering...

I can see even with only the 5 first on the list, if you take an average of 0.002/ghs for buying, there's a loss of about 400btc (and that is just only the 5 on the top of the long list...) which would mean what he refunded you would just have covered half what the 5 first of about 85 people above 10k/ghs have lost... THAT is what you'd call highway robbery ! And that is still a small one...

Damn how much did he run with some 2 to 300'000$ ? he might as well have robbed a bank, except banks have insurances.