Large electricity users in EU can get easily down around 0.1$/kwh.
Not really, look at the first table here. http://epp.eurostat.ec.europa.eu/statistics_explained/index.php/Energy_price_statistics and it was in 2011
Large users get 0.115 €/kWh in 2011 in Belgium, that means 0.15 $/kWh. I doubt it's cheaper now.
But AFAIK we don't know the details for petamine ... (we don't even know the annual consumption and if they should be considered a "large" user)
look at page 27 figure 24. Belgium industrial price 7-17 cents/kW (ex VAT, i suppose cryptx is a VAT payer
pdf here
with all the teraH/s cx had, they have been well qualified for e.g.the prices u state.