Due to the level of competition between free dating sites, as well as the overall drop in traffic to and revenue for dating sites generally, This represents a break from traditional externally sourced ads and is just one of the ways that the revenue models of free dating sites are evolving.
Especially popular in Eastern Europe, some sites offer full access to messaging and profiles, but provide additional services for pay, such as bumping profiles up to the top of the list, removing advertisements, making paying users' profiles appear several times in different places in the search results, and giving paying users a more advanced search engine to work with (in one example, free users may only search for persons of specified age, gender, orientation, and city, while subscribers may search for any and all parameters listed in profiles, such as height, weight, interests, etc.).
Single payments for regional advertising of profile (one-time appearance in scrolling banner for $1 – user picture, link, short text for mouseover; bidding war for stationary second banner cost of $1/minute).
Yes/No; 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.
Some sites provide free registration, but may offer services which require a monthly fee.