So a gold star and a kiss on the cheek, basically.
Maybe he's so worried about the rest of the code that he thinks a $10k bounty could quickly ruin him :)
I run a site with a slightly better alexa ranking than 4chan. I've read past 4chan blog entries so I know that the traffic demands are similar, and my own expenses average around $6,000 per month.
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So I can understand that some people think VC money is for the founders.