I bought one of the "fake Dyneema" UHMWPE tow ropes intended for a 4x4 off eBay. It came with an eye splice in one end. I chopped it up and made a bunch of soft shackles and strops. A friend of mine has a hydraulic test rig specifically set up to test
rope strength so I tested one of my soft shackles and strops, and the vendor's eye splice. The
rope and my soft shackle and strop all checked out, non-destructively, to 80% of the spec, and I quit there as I felt I could still get non-critical use out of them. The vendor's eye splice failed at 60% of the spec'd rope strength and it was easy to see why - they did not taper the buried tail.
So, while generic doesn't have as good a spec as name brand
Dyneema, even
cheap eBay stuff can meet its spec which is more than good enough for lots of things.