may be worth checking the stamping on the blocks independent of advertisement, as well. There is this premier winch company out there that is advertising 24,000 lbs max capacity heavy duty snatch blocks. The ultimate capacity of the blocks seems confirmed by looking at the size of the thing. Fine so far. They also advertise them specifically as suitable for winches up to 12,000lbs. OK, a safety factor of 2 you think, maybe low for some rigging, but not ridiculously so for recovery. So far so good, more or less. But then you look at the thing itself and it has a 9000lbs WLL capacity stamped on it. Uh? They are advertising a 9000lbs WLL-stamped block for up to 12,000lbs winches? What's with that? I suppose there may be some comfort in assuming that they know that the stamped WLL is underestimated, since this is a big and solid company. But that might be delusional. Interestingly, other companies I've seen selling what appears to be the same block only advertise the 24,000lbs capacity without reference to the WLL at all.
Can't quite make sense out of all this, since it seems that the big company mentioned above is opening itself up for lawsuits in case of accidents. (I will say that it would be refreshing if they are bucking the CYA-at-all-cost current practices, but it does not help with clarity for customers.)