Recently Delta offered a 50% transfer bonus on all American Express Membership Rewards transfers, plus 25,000 Medallion Qualifying Miles for transferring 50,000 Membership Rewards points to Delta SkyMiles. While that promotion has ended, they have a new transfer bonus. They are now offering either a $250 Macy’s gift card or 20,000 Membership Rewards points for a transfer of 50,000 Membership Rewards points to Delta SkyMiles. You have to register and choose one type of bonus, though you can earn that bonus multiple times for multiple transfers.
Is this a reason to redeem Membership Rewards points? No. But if you were going to anyway, this is certainly worth keeping in mind.