What to do with a badly damaged chain,the big question .It will cost you about a buck or so the time you buy the cutter and tie strap to replace one .Then you have to knock the thing apart and spin up a new one .Often times Baileys has loops on sale for like 12 bucks for a 72 driver loop of 3/8's chisel .Shucks if you bought the components to spin a 20" loop individually you'd have 100 bucks in it .
Those rocked chains are what I use for race chain stock .Usually the chain would be worn back to where it's thinner and all you have to do is cut it down to a 60 driver or whatever .Then the fun begins,file the stupid thing until your fingers get so stiff you can't bend them any more .