I have seen a few signals around 10.139MHz, but nothing decoded. There again - it might not even be JT65A...
Is it perhaps a case of there were only ever a limited amount of HF users of this mode, and once everyone had worked everyone else, that was it? (at least that's one theory I read on the web). I guess with the likes of the K7AGE Youtube PSK31 popularisation videos there are new PSK31 users coming online daily.
73 - Rob VK2GOM