POF.com, also known as Plenty Of Fish, is an online dating site headquartered in Vancouver.It is one of the biggest dating sites with over 90 million registered users across the globe. is one of the biggest dating services in the world.
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These sites have the broadest appeal and generally the largest membership bases.
They tend to attract a wide variety of members with personal goals that range from a casual fling to a serious lifelong relationship.
Mingle2 is a membership service of which users pay to be a part.
It was originally a service called Just Say Hi, but the site transitioned to Mingle2 in 2008 and now works with many populations of singles.
Some more seriously minded sites request that members fill out elaborate compatibility questionnaires.