CS is about meeting locals and getting to know an area through them, saving a bit of cash along the way is just a bonus and should not be the primary reason it gets used or hits the press :-/
I have been with the site for nearly 3 years, volunteering 1000s of hours to keep it running and loving every minute of it.
Query, 4.2million? I think need to proof read your article again ;-)
Please if the media has to push the concept and the site then go with these reasons and not just $$$
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