I'm not sure I see the point of where this is going...Danase I believe freely admits that the products that have his name on them are formulated to his specification by CG's, while Pb's and Adam deny any relationship. I think we've been around this subject a bunch of times, who has their own manufacturing plant other than Meguiar's (and who's to say they manufacture all of their products)? Perhaps some of the other mass-produced products, and IIRC after the consistency problem with Optimum polishes they moved some of that mfg. in-house. In the end some of the highest performing and most respected products are not manufactured directly by the "seller", so does it really matter who/where it's manufactured? Does Sears Kenmore make their own appliances? No.
If the price and the performance is satisfactory to you, than that is all that should matter. There are fewer mfrs. for everything than we realize.