Bonvoy Brilliant: AF billed 12/15 never asked for or received retention. Nothing offered so downgraded to the legacy Bonvoy card. Net refund $483.87.
Everyday Preferred: AF billed 1/16, rarely use this card, no previous retention offers, none offered this time either. Downgraded to the no AF everyday card to keep the credit line, wrongly assuming I'd received a full AF refund. It's going to cost me $0.52 for those 2 days

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ETA: Business Platinum card AF due today, never received previous retention, nothing offered today. Canceled.