What DNA data mining are they doing. Exactly.
And for whom...?
Consider just for a moment to whom these DNA companies might be selling YOUR data. How about insurance companies? Say you go and apply for some insurance. During the application process they happen to have access to your DNA profile. Because you have a marker for some sort of cancer they'll deny you coverage. Or worse they have access to your mom or dad and deny coverage based on their profiles. Those of you who are participating in this DNA scam are going to harm your children and grandchildren - I guarantee it.
It's already happening:
23andMe Is Sharing Its 5 Million Clients' Genetic Data with Drug Giant GlaxoSmithKline