The content of the test, though, is something like this :
Tell us about your height, weight, blood pressure, age.
By the way, would you like us to
Ok, now tell us about your medical history.
Sure you don't want us to spam you ? Just a little bit ?
Now a bit about lifestyle, transport use, drug/alcohol/tobacco use.
Please ? You'll barely notice the spam ?
Ok, nevermind. So, tell us about your diet.
Pretty please ? With sugar on top ?
Ok, moving right along. Here are your results ! Yay ! You're young.
Very well then. No spam.
Hey, want to send us lots of money for our medical advice ?
Hey, want to send us lots of money for our nutrition advice ?
Hey, want to send us lots of money for our exercise advice ?
... and so on. Oh well, I'm sure lots of people will sign up for it, and good luck to them (and their mail filters).