Morrisons Fuel Save: 3V Gift Cards to spend on Tesco?

A question about : Morrisons Fuel Save: 3V Gift Cards to spend on Tesco?

Today's newsletter alerted me to Morrisons Fuel Save program where for every Ј10 you spend on a Gift Card you get 1p/l off fuel.
At first I thought that wasn't very useful because you'd need to be spending big on non-essentials to gain from it, but then I found the 3V Card option which apparently operates like a visa debit card for any online shopping, meaning you could theoretically buy ten Ј50 Gift Cards for a month's shopping for example, spend it all online with Tesco, and gain 10p/l from Tesco Fuel Save whilst simultaneously gaining 50p/l from Morrisons Fuel Save. But it just seems too easy, is there a hole in my diabolical plan?

Best answers:

• Oh I think I might have found it. If you bought 10 Ј50 gift cards I don't think there's a way to combine any number of them into one transaction, at least without paying the charge to shift funds onto one card...
• 3V already know about all the crafty scams and schemes people do, which means there is alot of restrictions in place on these cards. Certain retailers can't accept them, along with utility companies etc so you can't buy them to pay bills with either.
• Same in the Peterborough area. I've e-mailed Morrisons to ask why they are no longer stocking them yet continue to have them on their Fuel saver website as a "partner"
• Morrisons FuelSaver promotion was a bit of a red herring. They expected queues of people every day buying gift cards. Whats happening now is a lot of the smaller stores are taking the cards out, or reducing the display size with less cards.