Facebook Dating Isn’t Feeling the Love in the U.S.

https://www.adweek.com/digital/facebook-dating-isnt-feeling-the-love-in-the-u-s-infographic/
https://www.piplsay.com/facebook-dating-what-is-americas-opinion-of-it/

Facebook Dating: 80 percent of people who used it in test countries came back every week
https://onlinedatingsoundbarrier.blogspot.com/2019/10/facebook-dating-80-percent-of-people.html
article about "Facebook's new dating service is flopping."
https://onlinedatingsoundbarrier.blogspot.com/2019/11/article-about-facebooks-new-dating.html

Could Spotify Become the New Online Matchmaking App?
https://onlinedatingsoundbarrier.blogspot.com/2019/11/could-spotify-become-new-online.html

Ablo App by Match Group (for users: 12+ years old)
https://onlinedatingsoundbarrier.blogspot.com/2019/11/ablo-app-by-match-group-for-users-12.html

The key to long-lasting romance: COMPATIBILITY is exactly STRICT PERSONALITY SIMILARITY and not "meet other people with similar interests or political views".   
Online Dating sites have very big databases, in the range of 20,000,000 (twenty million) profiles, so the Big Five model or the HEXACO model are not enough for predictive purposes. That is why I suggest the 16PF6 test instead and another method to calculate similarity.

High precision in matching algorithms is precisely the key to open the door and leave the infancy of compatibility testing.
  Without offering the NORMATIVE 16PF6 (or similar test measuring exactly the 16 personality factors) for serious dating, it will be impossible to innovate and revolutionize the Online Dating Industry.