Howdy, I am Whimzee, creator of the unofficial RBXDev group on Roblox. On this topic you can find some more details about the group and how to join.
The RBXDev group is unofficial group housing the community of the ROBLOX developer forums. All users in the group have proven ownership of a developer forum account.
If you want to join the group, request to join and reply to this topic. One of the group moderators will admit you to the group.
Approval is now done automatically by a bot. Replying to this thread is no longer necessary. You simply need to join the group and you will automatically be admitted within 10 minutes.
Also, here might be a restriction for most people: Max groups reached.
In that case, do not feel the need to leave an existing group for the RBXDev one, it is mostly for the group wall and keeping in touch with the stuff on Roblox and RBXDev with the shouts.