Thank you for the update, @antonin_d. In my opinion, it would be better to position the Development & Design category as either the second or third option.
I suggest automatically subscribing users to the Development & Design, Support, and News and Announcements categories, with clear instructions provided in the welcome email on how they can unsubscribe or customize their subscription. We can also update this message Welcome to the OpenRefine community forum with details on how to manage subscription.
I think we can also reorganize categories as outlined in this thread Welcome to the OpenRefine community forum.