Why should it change? The Tesco / Marriott conversion has NOTHING to do with points purchasing.

Don't forget too that the Tesco / Marriott conversion works both ways - you can cash in your Tesco points for Marriott nights (UK only, leisure break rates only). I can't see this going away.

And, as I said earlier, Marriott is making good money out of all of us! We are effectively paying £650 for £350 of Tesco vouchers. Marriott must be making AT LEAST £300 profit on every 125k conversion.