What leads you to believe that the ability to solve fizzbuzz is a valid selector for individuals who will contribute in the desired manner? In my experience, te

What leads you to believe that the ability to solve fizzbuzz is a valid selector for individuals who will contribute in the desired manner? In my experience, technical ability is not linked to social ability or empathetic behavior. I think the expectation behind invite-only membership is that members will curate their choices beyond basic tests such as this. Look at it this way, if the ability to solve fizzbuzz were a valid selector, the site could establish a simple screening process that doesn't involve an invite system. If your standing on the site is affected by your invitees' behavior, you may be in for a rough ride.