I don't. It's only happened to me once.

Right, but the data you get from that test is pretty broad. One test will create a background for an entire family. You only need to do one for one child. Or if both parents have one, or a sibling of both parents have done one, the children of that pair also no longer needs a test to see their background.

true but after the enormous initial boom they would have reached an equilibrium of a small trickle. the question is if that small trickle is enough to sustain a company on its own, so apparently not.

People that would presumably already know their lineage since their parents already took the test.