catalyst rpms for Fedora 23

I currently run Fedora 21 on an Imac, and use the catalyst rpms from rpmfusion. These don't seem to be available for Fedora 23 (or 22). The F21 SRPMS rebuild cleanly on a F23 system (though I've not tried to use the results yet). Is there any reason why they are no longer built (other than lack or time or resources)? Regards, Chris