Do all hookup sites cost money?

For every dating site or app that charges close to $40 per month, such as Match, eHarmony, or JDate, there are plenty of other popular ones like OkCupid or Tinder that are free. Forty-eight percent said Match, a paid site, but PlentyOfFish (free) and eHarmony (paid) tied for second most popular, with 23 percent apiece.