With BT offers, the catch is that you usually cant add to the charges on that account because you wont be able to pay off the non-BT balance ‘first’, and thus interest starts accruing… Are these offers any different?
Yes they are. You can continue to use and pay off the new balance each month without interest and the plan piece is in the adjusted balance. Pay the adjusted balance each month and no interest on anything. I have no idea what happens if you don’t pay the full new charges each month.
So new charges + plan charge = adjusted balance for no interest. From what I can tell, I also get the points/miles/etc for all of it.