If you cant download, you cant rate. This makes sense as long XFRM is a tool for downloading add-ons.
If you want people to rate, but not to download, the RM fails.
I know. Because you see the use of RM as typical RM only .
Anyway the only situation where you need both is the option "needs download before rate";
then download must be allowed to rate after.
In any other situation this is just not needed, i guess.