His distant relatives did, like second or third cousins. The point of GEDmatch is to connect you with other potential DNA matches in their database. That is not the point of whatever service your family presumably used, and their data is not used in this manner. Apples and Oranges.
Okay, I think maybe we’re trying to making different points here. You are saying that the policies of GEDmatch are different than those of 23andMe and… I don't know who else is in this industry… mormonhumangenome.com or whatever
The point I was trying to make is that not registering with one — any — of these databases is completely pointless because the nature of the information is such that you can be fingerprinted if your siblings decide to play.