The people who put in more than one order – do you seriously think they are going to honour what can be a 80% discount when you are so clearly raping them for all they are worth?
I can potentially see it being honoured on a reasonably sized order, once, but a £50 order, multiple times?
It’s a gamble without loss of stake; Halfords “honoured” the orders placed against their code ****-up a few months back (if pictures of multiple inner tubes & other swag are to be believed).