Blackhawk makes some of the worst knockoffs of others designs, in...let's just say, very inexpensive places to have people sew for you. The most expensive gear is not always the best, but the cheapest almost never is.
What is a warranty worth when a piece of critical gear fails on you at the worst possible moment, because the material, thread, construction, sewing, etc. was inferior?
How happy would you be with a lifetime warranty on a parachute, if it failed you in flight?
FWIW, I was sorry to see Eagle go the route they did, and their current production, while available in great quantities, is not made to the standards that they used to apply when John was in charge.
First Spear is run by some of the former Eagle guys. I think their stuff is pretty good, so far.
http://www.first-spear.com/home.php
Caveat Emptor.
TR