I think Sanger is saying that Jimbo's behavior at the time did not illustrate, as shown by the email, a "refusal to have ads".  However, Jimbo appears to be saying that the email indicates nothing of the kind.  Sanger says that he himself made no effort to have ads, contrary to Jimbo's assertion to the contrary.  So, we seem to have a "he said, he said" situation.  This is your talk page, Jimbo.  Do you agree with my assessment?