The immediate, strong response from the AEA leadership deserves praise. I am sure we all (no, just most of us) look forward to seeing what actions follow.
Along these lines, I wish to point out that the three institutions the signatories have spent most of their careers at were all hiring this year. UC Berkeley posted in EconTrack. Neither MIT nor Princeton posted.
(Nor did my institution, despite repeated requests on my part.)
There are two separate points here.
(1) There is a failure of leadership on the part of the most prestigious departments. If the leading departments contributed, most other departments would fall into line.
(2) It would be easy for the AEA to setup an opt-out default for JOE ads to be posted to EconTrack with a commitment from the advertiser to update EconTrack and a contact point for the AEA to request updates that are not volunteered.