Ancestry.com was monetizing my genealogy research long before 23andMe existed. They took data that I had posted on free genealogy websites and added it to their database. I failed to copyright (a lot of trouble for the data I was posting), so I have no one to blame but myself, but 15 years later I still don't have an Ancestry.com account. As for 23andMe making money on my data, I hope they make money somehow, or they will eventually be out of business. They have been supported by Google capital all this time, or they would have gone bankrupt long ago. All of my genomic data is free and open, and if I could earn income with it, I suppose I would, but I'm pretty sure that's not going to happen.I have encouraged my family to share in the same fashion - some do and some don't.
I protect my residence address, my phone numbers, employment history, credit history, etc. scrupulously and vigorously, as I consider that information to represent real personal risk, but I hope and pray that some skilled researcher will find something of interest in my genomic data. More eyes means more probability of detecting genetic errors. If I was a very skilled and experienced molecular geneticist, I might feel comfortable reviewing my own data without any help, but that is far from the reality, so I can only hope. Same is true for any of my genomic testing results from any source. I share with anyone and everyone who asks from within the 23andMe web site.
So, perhaps I should disclose my reasoning, just to be clear. No human being, or any organism for that matter, has any choice about the circumstances of their conception and birth. You don't get to choose your genome, you don't get to choose your family. So I don't see any reason that I should conceal anything about my genome, in the context of social stigma. I really, really do fully understand that there are many reasons that might not be true for some people, and I fully support their right to protect their genomic data, and I fully support stringent legislation to that effect. Apart from social stigma, there are the oft cited risks of health insurance raising your premiums based on your genetic data. That is presently fully prohibited by law in the USA, but not necessarily in other developed nations, so there is another reason for not being open. Perhaps the most significant of all is that life insurance companies ARE NOT prohibited from discrimination on the basis of genetic information. In my case, I'm very fortunate that for the most part, my genomic data will work FOR me and not against me if reviewed by insurance agents.
Beyond that, most of the risks of sharing are more about Hollywood science fiction that anything else. If I'm every unjustly accused of a crime based on Codis markers, my entire genome is public information, so I'll never be a victim that needs help from the Justice Project, and the prosecutor would be mighty embarrassed for using trumped up DNA data. All in all, I think that the benefits of having a public genome far outweigh the risks. Thanks for bringing up the subject!