I love how some companies are "smart" but get every details wrong anyways. When I was in Argentina in 2003, there were giant internet cafés (up to 250 computers I believe) were the price of the minute of internet was floating depending on how many people were online: you had a max price, a min price and the current price was just the proportion of used computers (so it was not a bidding market). You had a few screens on the wall telling you the current price (I think they billed at the beginning of each minute). In the middle of the night the price could get quite low.