Thanks. So if I get this correctly: some ranked events can give you points, but none can be used as DIYs ?
Only one type of ranked & competitive event that isn't already an Audax can get you points; a 24h TT (and it has to be one organised under CTT's rules)
It is the specific exception because AUK points for distance covered in the 24 long pre-dates even the idea of DIY Perms. AUK has chosen this in order to support the event by encouraging its riders to ride the event. You also don't need to enter anything else (e.g. a corresponding AUK DIY event) to get the AUK points if you ride a 24, you just need to be an AUK member and it should magically appear (you may need to prompt the recorder though).
If you are sneaky and like ignoring rules then I'm sure you could try and get points for riding some random Sportive by entering a DIYxGPS and ride it making no mention of the Sportive to the DIY organiser. It's unlikely the DIY organiser would be able to find out unless they knew the details of the Sportive already. If they did find out you could end up with the points being revoked. One of the reasons not allowing ranked/competitive events is the lower standard of self-sufficiency required for those events (with service/support vehicles, etc) which doesn't quite match with the spirit of Audax. The 24 is not like this at all as there's no service/support vehicle.
More info on this over at the official AUK forum:
http://forum.audax.uk/index.php?topic=563.0Trying to DIY a 12h TT would be nigh on impossible as you won't know the exact route in advance (you may be sent out on different loops depending on timings) and also repeated loops are verboten. This would probably rule out 100mile TTs too (most contain repeated loops) and you'd need to ride another ~25 miles on top of the TT in order to get any real points.