High Quality Content by WIKIPEDIA articles! PlentyofFish (POF) is an online dating site, popular primarily in Canada, the United Kingdom, Australia, Brazil and the United States. The company, based in Vancouver, British Columbia generates revenue through advertising. While it is free to use, POF offers premium services as part of their upgraded membership, such as seeing the date and time a user viewed your profile and allowing you to see whether a user read and/or deleted your message.