"Taiwan, officially the Republic of China,"
How to slap an entire nation across the face.
VCubes. You have to remember except for the VCube 8 and 9, which are from 2015 and 2018 (big question mark but I aint gonna look it up) and the VCube 3, which is just a Dayan with extra controvercy, all designs for the VCubes are from Verdes' imagination of how (big)cubes are to be designed.
The design could be as young as 2013 or as old as 1990, so it's not fair to compare them with today's market.
When the 6 and 7 came out, there was no other physical cube of that size. You had to use a VCube.
When the 4 and 5 came out, there were only a few options, mostly even worse. Rubiks, Eastsheen, Maru(I think the small 4x4 was out by then). The first Shengshou big cubes were basically VCubes with actual quality control and slightly less interference moulded in.
If you take it one step further, in 2018, when Shenshou released the Gen7 big cubes, they were actually mained by some. Verdes mechanism with ridges was used until 2018-2019.
We are essentially talking about plastic pieces and a lot of human time needed for assembly relative to the price paid.
Of course china will have the edge in the market, as with just about all other plastic goods.