I can't imagine those rings were the result of anything other than a climber taking a fall and the sudden weight and force of the climber causing the deformation of the rings. Like already stated, having the two rings on each connection to form a buckle, lessens the load even more and we certainly aren't applying the forces in a hammock that a falling climber would be applying. I've got 5+ years on SMC rings and have never had one fail, or even yield. I don't keep suspensions on my hammocks in storage, so I tend to use the same suspension on whatever hammock I'm using at the time. My goto webbing and ring suspension has at least a solid year worth of hanging from it, probably more. I have complete faith in the SMC for the purpose of hammock hanging.
I don't like the Omegas due to their girth. The webbing tends to bunch-up in them because the inner diameter is much less than the SMC rings. That doesn't mean they don't work just fine; I have more than a couple of them in the drawer. You just have to be absolutely sure you're tying the backup knot since the webbing isn't flat against the surfaces and WILL slip.