Like @lightyear said the option to vote is at the bottom of the first post in this thread.
I would be happy if we end up with about 150 votes. Like @nowfeelsafer said there’s a potential of 393 voters, but I’m sure not everyone is active. We didn’t see any other way to restrict voting. Trust level 1 is quite easy to achieve and inviting people just based on liking them or their contributions so far would have been a time consuming process and perhaps also a bit too random.
Not sure that 500 votes would give a substantially different result than let’s say a 100/150. Then again I may be totally wrong about that.