Overstock.coms sales through bitcoin are expected to add 4 U.S. cents to its earnings per share this year, the online retailers Chief Executive Officer Patrick Byrne told Reuters last Friday. Bitcoin sales at Overstock, which started accepting this type of currency as payment for items on its website since January this year, have exceeded $2 million so far. By the end of the year, Byrne expects Overstock to do $1 million in bitcoin sales per month.