I’m not sure where you got the 10% figure from. This Australian site tested a number of snatch straps – no ropes, alas – to destruction and found the ARB was giving them an average stretch of 23.5%. And was consistently breaking at well above their rated strength, which not every tested strap did.
I don't like to make plans. They cause the word "PREMEDITATED" to get used in court!
DON'T FEED THE VULTURES!
My Body is a Temple! Ancient, Crumbling, Probably Cursed . . .