You can go to the settings and opt out of their Research consent document now, which also explains how the data is used. I think they 've been pretty clear about how they plan to use the data of existing customers.

There is also the danger of people having a false sense of privacy by opting out of 1 or 2 genetic tests. This is shared information between relatives and the population at large, not exactly top secret data. The degrees of separation between you and me are 2-3 , so it s very easy to identify people indirectly , hence why it was possible to solve decades-old crimes.

I think our genetic information is less private than the contents of our brains, in general.