The number is important enough to be featured on the main page of freerepublic.com - shouldn't it be correct?
The number on the front page is just a nice round number and is close enough for marketing purposes. Technically, it is accurate even based on your own analysis because the only quantifible number one has to go on is member number. Everything else is assumptions. You really need a life.
Were you the guy that had his panties in a bunch..when McDonalds didn't have the exact number of burgers sold every year on their signs?