Yet somehow we made it into 2009, and things began to look up. Long plagued by an inability to attract mainstream advertising, I partnered with an individual who took over representing 4chan's ad inventory, and for the first time in years the site began to break even.
This was also true of Usenet.
That, combined with the plausibility of the following, leads me to believe he receives massive government subsidies:
Additionally, https://www.cloudflare.com/plans seem to suggest the bulk of that costs an unbelievably low $3k/month.
I once ran a site that pushed about 40TB a month (about 1% of 4chan) and it cost me $100/month to run. If you extrapolate that figure out (ignoring the fact that bandwidth gets cheaper the more you use), 4chan could cost as little as $10k a month to run.