Meta fails the jam in the following ways:
New users, or lurkers can't post a game or vote on the jam entries unless they get 5 or 10 rep respectively
Voting on completed games commences as soon as the game is submitted, and this may sway more votes
No way to tell who is participating or show progress during the jam
For #1, it's really easy to get 5 rep, ...
As you may be able to see, the link colors on Meta.GameDevelopment have been updated. They have been reverted to the standard Meta link colors.
Update July 24, 2017
Chat and GD.SE link colors have been updated and will be updated once production builds out. Once production build, I'll update the post's status.
Update July 26, 2017
Production has been ...
In my opinion, there are two main issues, and a secondary-level issue:
Rep needed on Meta. This restricts entry.
Someone needed to manage the second site.
Restricting entry is undesirable, but running a second site will take a non-trivial amount of someone's time.
In my uninformed opinion (because I have not taken part in a Jam, and have the rep to post ...
Personally I prefer bigger jams, even if it means opening it up to non-meta and even non-GDSE users.
I argue that this is already the case for the GDSE jams: take a look at past entries, you'll find maybe half come from less-active users, those with 100 rep or less. Furthermore there is no correlation between rep and submission quality; at time of writing, ...