FTX has put out a press release announcing a “process for voluntary return of avoidable payments.” This may be a useful option for grantees looking to urgently return any FTX-associated funding rather than wait for the bankruptcy process to play out. But anyone interested in returning money should keep in mind that in order to avoid being subject to redundant clawbacks or other legal claims later, it’s crucial to receive proper release-of-claims paperwork in exchange for returning funding. I strongly recommend you consult with a bankruptcy lawyer before starting this process. The Open Phil legal team is putting together a list of legal service providers for grantees who want to explore this option; we’ll follow up after the holidays with more information.
There are two mechanisms likely at play here -- fraudulent conveyance under 11 USC 548 and applicable non-bankruptcy law doesn't have a 90 day limit.
I don't see how F/P provided new value to the insolvent FTX parties, or any value at all, in exchange for the transfers. The theory behind new value is that the other creditors are just as well off as they were before and so there has been no preference.