American Express is offering a 50% bonus on transfers to Plenti through December 31.
You earn points with Plenti partners. You can also spend your points (at 1 cent apiece in value) on those partners. A 50% bonus means getting 1.5 Plenti points per Membership Rewards points — valuing those Membership Rewards points at 1.5 cents each when redeemed to pay those bills.