What would they do with such information?
Add - a Google search throws up lots of info:
https://tinyurl.com/mush7d6x
When it comes to the raw genetic data that's breached we're entering uncharted territory. It's disconcerting to say the least though. The initial breach was specifically marketed on hacker forums as being the genetic info of Jewish people so there's an implied threat there already. The most recent one involving British users promises that it features identifying information on celebrities and European royalty. The rise of sophisticated AI models that can process this vast amount of data is also quite scary.
The secondary kind of data breach involving just information on the relatives profile page is not quite as bad, although it could still potentially be used to identify people who otherwise wish not to be identified.
I'm not happy with 23andme's communication on this. In my case I had no issues with my account security and was affected purely because someone else was - this is a really bad design for a website that handles personal genetic data and should never have been allowed to happen.
I'm also not totally convinced that 23andme have a handle on the scale of this and how much DNA has actually been breached. It wouldn't surprise me if it turns out that hackers found an exploit to also access the genetic data of relatives connected to password compromised accounts.
This is a screenshot of a post by the hacker explaining his motives - it's a bit techy but worth reading:
https://www.reddit.com/media?url=https%3A%2F%2Fi.redd.it%2Fphscpvhgbevb1.png