Breaking, more info to come after confirmation/clarifications.
From latest Platinum terms and conditions:
SkyMiles Program
This benefit will end on 8/31/21. All Delta SkyMiles® program rules apply to SkyMiles program membership, miles, offers, mile accrual, mile redemption and travel benefits. To review the rules, please visit delta.com/memberguide. Taxes and fees for Award Travel are the responsibility of the passenger and must be paid at the time the ticket is booked. Award Travel seats are limited and may not be available on all flights or in all markets. Partners airline benefits subject to change and subject to the terms and conditions of each partner. All Delta Sky Club rules apply to Delta Sky Club use. To review the rules visit Delta.com/skyclub. Offer, rules and benefits subject to change.