eHarmony is nearly a 12 years old & obsolete site, and a HOAX with any scientific proof.
eHarmony Inc. instead of innovating, patched that obsolete site with the "new" features:
a BIG change to the matching page experience.
The Online Dating Industry needs Innovations!!! But innovations are not adding more bells and whistles to actual online dating sites. Or launching new ones with the same stupidities as the old ones.
Only 3 major discoveries can help to revolutionize the online dating industry.
I) Several studies showing contraceptive pills users make different mate choices, on average, compared to non-users. "Only short-term but not long-term partner preferences tend to vary with the menstrual cycle"
II) People often report partner preferences that are not compatible with their choices in real life. (FORGET Behavioural recommender systems or other system that learns your preferences)
III) What is important in attracting people to one another may not be important in making couples happy. Compatibility is all about a high level on personality similarity between prospective mates for long term mating with commitment.