I agree that the Online Dating Industry is selling elixirs, tonics, snake oil liniments and other patent medicine and performing like the Pharmaceutical and Cosmetic Industry before the USA Food and Drug Administration was created where any player can make any claim without any credentials.
I live in a South American country and I am really astonished to see how online daters in "1st World" countries are really victims of human experimentation. No actual online dating site is "scientifically proven" because no one can prove its matching algorithm can match prospective partners who will have more stable and satisfying relationships -and very low divorce rates- than couples matched by chance, astrological destiny, personal preferences, searching on one's own, or other technique as the control group in a peer reviewed Scientific Paper for the majority (over 90%) of its members.
The entire Online Dating Industry for serious daters in 1st World Countries is a HOAX, performing as a Big Online Casino, with a low effectiveness/efficiency level of their matching algorithms (less than 10%). In the same range as searching by your own. It needs to reduce the false positives problem and big data dating IS NOT the key to long-lasting romance.
Online dating sites using the Big Five model could be considered obsolete sites, because the Big Five model has been proven as "an incorrect and incomplete model of personality"
The key to long-lasting romance is STRICT PERSONALITY SIMILARITY, but ... the only way to revolutionize the Online Dating Industry is using the 16PF5 normative personality test, available in different languages to assess personality of members, or a proprietary test with exactly the same traits of the 16PF5 and expressing compatibility with eight decimals (needs a quantized pattern comparison method, part of pattern recognition by cross-correlation, to calculate similarity between prospective mates.)
High precision in matching algorithms is precisely the key to open the door and leave the infancy of compatibility testing.
Proof of FRAUD from eHarmony
article: Dr Love: Biological anthropologist Helen Fisher
The Surprising Way Most People Meet Their Partners
article "Critics challenge the 'science’ behind online dating"