I think it’s a mistake to skimp on quality and safety standards to save a few dollars with an unknown manufacturer using unknown materials, with unknown testing results.
Personally, I’d rather buy a name brand figure 8/rescue 8 that has been tested by an accredited facility and shown to be up to spec. Yeah it misses a little of the benefit of the other devices and isn’t as cool as newer devices. But it’s pedigreed and falling out of a tree over a bad mix of bottom price aluminum that’s being made on worn out tooling seems like a way worse potential than losing a little cool factor for the same money.
If you could get Petzl/madrock/etc to make a tree stand version that’s a little heavier, 3/4 the strength, and 1/2 the price, but went through lab testing to show it’s good enough for our use, I’d jump in. But buying unknown quality to save a few bucks seems like the way to get hurt. Those knock offs are “probably” good enough. But I don’t want to save $50-$70 on probably good enough. I’ll go with something simpler that is good enough or spend the extra and know I’m getting a much higher likelihood of a quality product that won’t fail.