too bad you cannot select no stars. eharmony is, very simply, and unmistakenly, a scam.
there is no other possibility

i selected only women from w/in a certain geographic area , and they sent me matches from all over hell. i am a very fit and healthy man and selected that as very important, and they sent me dozens and dozens of obese women. the list goes on and on . i even did a couple test selections and it becomes immediately clear that they don't pay the slightest attention to any "scientific methods" or any methods , for that matter other than the method of cashing your check.
i cannot emphasize enough how bogus this website is and what a waste of money. go hang out in the fresh produce section of your local grocery store and your chances of meeting a good match will be infinitely higher, i assure you.

please, do yourself a favor and avoid eharmony like the plague.