What other option do they have? Randomly chosing people out of a crowd? You have to be kidding me, your reasoning for your behavior is that of a preschooler.
Finally, you're entirely WRONG, Joost is available to anyone at all on their website for free right now, you don't need an invite or anything.
How old are you, 4?
I hold a grudge for a very long time. Most haterz do. So I'm hoping Joost suffers a slow and painfully expensive economic death.
See, my mom taught me never to ask anyone for an "invitation" to something. It's quite rude. Actually, "asking for" is quite the opposite of "being invited."
So I won't ever be a part of a project that promotes such anti-social behavior as that exhibited by the core founders, and is the foundation of, Joost.