I didn't notice this, it seems like many didn't... or did but didn't want to participate. There is a separate section for promotions and giveaways:
Games and rounds - https://bitcointalk.org/index.php?board=71.0

By the way, Staking Limit is ∞ for a long time... and sometimes that limit depends on the staking points. Is this like a promotional period, or will the old system return?