While it is free to use, Plenty of Fish offers premium services as part of their upgraded membership, such as allowing users to see who has "liked" a member through the service's MeetMe feature, and whether a message has been read and/or deleted. The company, which is based in Vancouver, British Columbia generates revenue through advertising and premium memberships. Plenty of Fish ( POF) is a Canadian online dating service, popular primarily in Canada, the United Kingdom, the Republic of Ireland, Australia, New Zealand, Spain, Brazil, and the United States.