Maybe he submits papers and conference program comittee find them relevant and interesting enough?

After all, Yudkowsky has no credentials to speak of, either - what is SIAI? Weird charity?

I read his paper. Well, the point he raises against FAI concept and for rational cooperation are quite convincing-looking. So are pro-FAI points. It is hard to tell which are more convincing with both sides being relatively vague.