We do not connect a ring directly to the rope without weak link. It is easy and quick to swap them as needed.
Two rings on one weak link. Get a link break and you've lost two $$ rings.

Granted, most use ropes that are within the 80-200% requirement for the glider being towed and splice the ring directly to the rope with no weak link required.
Splicing another ring to the first with a weak link has been done with no issues. The risk again is the loss of two $$ rings in the event of a primary rope break.

I have seen two rings on one link. The risk is someone using the wrong ring, tost on a Schweizer hook. Normally the extra ring would not interfere with a release.

BillT