Board Thread:News and Announcements/@comment-34343471-20190207183504/@comment-32823535-20190208171500

There has been no pattern to when an event room becomes a premium room:

Candy World event - premium room, also added at that time Newsroom

Wonderpark event - premium room, also added at that time Grotto

Lair event - premium room

next 4 events, Farm, School, Snowy Yard and Cozy House, did not become premium rooms

Moon Court - premium room

Sakura Gardens - premium room

next 6 events did not become premium rooms

Mill - premium room

My guess is that the Golden Harbor will not be a premium room, but like I said, there is no pattern. And yes, they used to add rooms that were not event rooms, back when there were fewer rooms. I don't think they need to do that anymore. You had to be level 130 to open the highest non-event room then. Now if you start playing you have to get to level 171 to open the Poet's Square if you missed the event.