The site is owned by IAC, who own Match, Tinder and OKcupid. They use this site to gather your data and information. That is why it is free to join. The site is NOT moderated because they need that data to survive. That means the site is FULL fakes and scammers. Web traffic and usage is falling so will they will allow everyone to join to make the site look like it is more popular than it is. Also everyday PoF itself adds hundreds of fake profiles, mostly female profiles, to try and attract more new users. If you join they WILL sell your information. You will be targeted by scammers.
How do I know? I work for IAC.