In that article, Ms. Kate Bilenki, "director of love at PlentyOfFish, the Vancouver-based dating site with more than 33 million registered users worldwide" (the site’s membership has increased 40% over the last two years), had also said "PlentyOfFish is responsible over a million relationships per year, and about 300,000 of those result in marriage"
1 M relationships == 2 M persons.
2 million / 33 million == 0.06 or 6% Success Rate
but if it is over a million but less than 1.5 millionless than 3 million persons / 33 million == 0.09 or 9% Success Rate
i.e. PlentyOfFish is performing as placebo, Success Rate less than 10%.
quite similar to eHarmony
148,311 marriages and 1,130,006 non-married, monogamous relationships (ESTIMATED TO BE) started by eHarmony, between January 1, 2008 and June 30, 2009.
eHarmony reached 40 million members during 2011
eHarmony reached 30 million members during 2009
148,311 marriages and 1,130,006 non-married, monogamous relationships ==
2,556,634 persons / 30 million == 0.085 or 8.5% Success Rate for eHarmony.
The majority, over 90% of eHarmony's members are not going to achieve a long term relationship with commitment (or marriage) using that site.
and quite similar to Match
Moreover 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%)
Online Dating sites should begin offering Compatibility Distribution Curves, showing how compatible you are with the rest of other members.
like this sample.