I was stunned to discover that another philosophy-related blog–that does not make public its traffic, though it appears to be quite a bit less than this blog–is apparently charging ad rates close to mine.   I'm not raising my rates, nor do I need additional advertising (as is obvious).  Here's what someone wrote to me not long ago:  "[W]hen you originally posted the link to my site I received over 2000 hits by way of your blog in the first two or three days. [X] posted a link the same day you did, and I received maybe around 50 by way of that site."  So a note to philosophy advertisers:  if a blog does not have public traffic statistics, be careful!  There are now a lot of philosophy blogs, but absent a public stats counter, it's hard to tell the size of the readership and thus what kind of exposure you will really get.  (The only other public source that gives you some idea is Feedly, though as we've noted before, it accounts for only a portion of the readership, but at least gives a comparative metric.)