Promoting dating sites via Youtube? Some good news here
 

Adsense is now actively pushing youtube promoted vids to their huge affiliate network:
http://adsense.blogspot.com/2009/10/...appear-on.html

As the number of YouTube content producers continues to grow, many are looking for new ways to reach new audiences. That's why we're happy to announce the launch of YouTube Promoted Videos in AdSense ad units.

Promoted Videos are YouTube videos -- from movie trailers to product demos to really almost any kind of video on YouTube -- promoted by their creators so they can reach a wider audience. (You may have already noticed Promoted Videos on YouTube.com, as they appear on partner watch pages and alongside YouTube search results.) Extending Promoted Videos to AdSense sites will enable these content producers to broaden their reach, while providing you with another way to earn from your ad space. At this time, these ads are only available in English to US publishers, but we're looking forward to expanding to additional regions and languages in the future.

Strategy might take the form of: pay for a viral "push", then the viewers themselves start pushing the video to their online social circles :)