They are probably being paid to do so by Harbor Freight or other brands or companies. Since Snap-On is known to be one of the best tools professionals use to make a living they are being referenced or targeted. I would also do the same even if I don't believe in the lower cost product as long as I get paid by the sponsors.
Snap-On likely pays for advertising as well.
Snap-On is even mentioned in at least one of the Fast and Furious movies, by a character with a high end shop, who specifically mentions that “All his tools and Equipment are Snap-On”.
Snap-On dealers seem to have “Canned Demos” they use for customers to sell the various tools, that just demonstrate the advantages of the particular tool.
While I don’t necessarily hate “Canned Demos”, the best way to test a general purpose tool, is to use it for ultra difficult tasks, or to hand it to the 300lb. Weight lifting idiot you know, and have him try to use it, and probably in a way that was not intended.
This is what I mean about “Canned Demos”.
And a couple TikTok videos if they work.
https://www.tiktok.com/video/7343668048689237294
https://www.tiktok.com/video/7234840506973293866
I personally prefer video reviews like this one, which isn't comprehensive, but also isn’t a one trick pony either.
Also, showing an older pair that has turned dark with age, and has lost its grips over the years, sort of shows the potential durability better than a brand new display pair does.
One or more of the videos from the major Automotive trade show showed that Harbor Freight is planing to release a version of these.
People were complaing about Harbor Freight “stealing” Snap-On’s IP because of this and some other items, But if you look up the history of these pliers, the design seems to go back to at least the early 1970s, and I couldn’t find a patent for the design so it likely wasn’t original enough in either function or aesthetics to be patentable.
It’s also far from the first or last “compound leverage” plier design.
Judging by the old pair in the last linked video above, the Snap-On version does seem durable.
I’m more likely to purchase the Harbor Freight version, if it ever comes out, first though, to determine if I find the design useful, since these pliers cost $90 from Snap-On.