I think its just coinhive they are using which mines monero and then you do an exchange rate between monero and whatever currency you want.

Exchange rate at the bottom of the page says The current rate is 250.000 hashes for 0.001 SBD whichis pretty rough all day of running an a boat load of electricity cost will land you about $0.10 of SBD and a nice fat electric bill of about $2 a day for an i7 CPU