I'm not sure I understand how that that would make a material difference. The company might not know who submitted each sample, but the company would still have

I'm not sure I understand how that that would make a material difference. The company might not know who submitted each sample, but the company would still have their entire genomes in their possession. That is no different, than if somebody obtained the data from a biobank. The data in biobanks is normally also anonymized, insofar that you can anonymize whole-genome DNA data