So when a person's annual fee comes up for the IB, apply for the Plus. If you get instant approval, cancel the IB. If not, phone recon and say you want to switch your credit line from the IB to the Plus and cancel the IB then with the CSR. Rinse, repeat every 12 months. New bonus each year, no annual fee each year, same benefits perpetually. Any flaws with this strategy that you can see?