Being someone with little money my whole life, can say eating only once per day saves a lot of money. Not everyone can do it, but it's easy for me after many many years.
I generally eat around 6 or 7 pm at peak hunger time and them I'm good until tomorrow.
Do they have the DNA of everyone that took the test? Logic says yes they absolutely do. Imho that was the whole purpose of the testing to begin with. Hence the big push for everyone to get tested. The big question is what are they doing with it?
Kek, why can't the English learn to speak?