Intel used to be infamous for doing this, if you'd like a western example.
A number of the integrators I worked with added rules banning customer-supplied CPUs because Intel would give away "working" product to educational/other institutions that, uh, did not POST, and it was such a headache so often that they banned using the product.
I can't speak to why, but I can promise you firsthand that both of those statements were true and not things I simply heard about.
My old workplace received such donations, we had to pay to replace a number of them that were DOA in the resulting systems, and the VAR we were using to build our systems for us informed us they had added a policy forbidding BYO for that reason between our failure rate and others who had used them.
My assumption would be that they were only slightly more carefully managed than things that "fell off a truck" - that is, they were probably given away internally because they were nominally cosmetically unsuitable for sale and not easily salvageable by binning, but you got what you paid for in terms of warranty coverage.
A number of the integrators I worked with added rules banning customer-supplied CPUs because Intel would give away "working" product to educational/other institutions that, uh, did not POST, and it was such a headache so often that they banned using the product.