I saw this article – https://www.usatoday.com/story/news/nation/2019/04/08/23-andme-dna-test-30-siblings-sperm-donor-facebook-group/3373958002/ late last night, but posting it from my phone was a lot more trouble than it was worth. She tested with 23andMe.
Technically, they are half-siblings and that’s why I titled the post differently from the link’s title. While I don’t want to raise the question, there have been enough doctors and lab personnel who substituted their own DNA in place of the donor picked by the customer that the question should be raised.
A friend’s brother sold to the local sperm bank to pay for medical school. The brother made enough money to pay for medical school. So far, one child has tested who is a result of the brother’s donations.