- ECOH Cam
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- Exalted Heroic Member
There are secret criteria that a group must meet in order to be spotlighted. "Around 300 members" seems like a good estimate, though sometimes groups get in with way less than that. But that's a rarity. Activity is great contributing factor as well.
One of the great flaws of the "Private Group Spotlight" is that once a group is featured on there, it goes into the cycle. This means that even if the group is "dead beyond belief", it will still be featured sooner or later.