I was talking to AMEX the other day and found out something unexpected re transferring points between different reward program tiers. Because some members reported that they have had difficulty linking reward programs between Business and Personal cards, I assumed that you couldn't therefore request to transfer points between a Business and Personal card reward program. It appears, however, that it doesn't matter whether cards are Business or Personal cards when it comes to transferring points between reward programs (all that appears to matter is that the Reward programs are in the same name)