I wondered how expensive their serves actually are. 1 month of reddit gold ($3.99) pays for ~276 server minutes at the moment, or so they say. That's about 0.0145 cent per minute. In a 30 day month there are 43200 minutes. Using these rounded numbers a month of hosting therefor would cost $626.4.

Though I highly doubt that figure is really that low (or doesn't include bandwith and similar, if applicable) I somewhat wish it was because that would be a sign of craftsmanship.

Unlike other similar companies who spend several hundred thousand dollars over two years just on hosting and go bankrupt, despite getting 1% of the traffic.