Sorry if I'm being a Nazi, I never know if someone just typo'd something or acutely used the wrong word, and if so if they would appreciate knowing the correct one or not.
The front page tagline of the site is "Life is short - Have an affair". It is NOT a place for single people, no matter how many people try to spin it otherwise.
Have you actually ever bothered to look at the site? Front page, dropdown box options: "Attached Female seeking Males" "Attached Male seeking Females" "Single Female seeking Males" (implied "attached Males") "Singe Male seeking Females" (implied "attached Females") She would be an "Attached Female seeking Males", looking for "Single Male seeking (attached) Females" No it's not a site for single-seeking-single, but it is very much a site for single-seeking-attached and vice versa.
I have a theory that it's impossible to prove anything, but I can't prove it.