I am having the same issue starting yesterday. My host suspended my site twice for usage. I tracked it to the same admin/ajax-php. I just installed the plugin Query Monitor and it started tagging Jetpack as making to many PHP calls. I am not sure what has happened as I have not added a new plugin, made changes, etc. I have been using the same version of Jetpack for over two weeks with no issue, just started out of nowhere. Looking for advice also
