...the point is that if the "public" thinks the number is much more than it actually is...this will act as encouragement to attract new members...an old marketing scheme to help "create demand" for your product.
Most of us don't realise that Companies produce multiple brands for the same reason....same product, different brands, different prices...helps keep the competition out of the market.
Oh yes, well back on topic, there are people that know roughly how many real members there are, and how many "discrete" page views the site gets a day. Those people being the "ad guys" on this site, who need to know so they can set their rates accordingly.
Someone should just call up the site ad department as a potential client and ask.