if I downgrade to Rewards+SM, is that considered "account closure" in terms of resetting the 24 month clock to getting a SUB on a card?
Bonus ThankYou® Points are not available if you received a new cardmember bonus for Citi Rewards+SM, Citi ThankYou® Preferred, Citi ThankYou® Premier/Citi PremierSM or Citi Prestige®, or if you have closed any of these accounts, in the past 24 months.