Originally Posted by
ratechaser
in which case I think that could actually be counterproductive overall - the weekly offers can be worth hundreds of extra points but are based on your buying history - so if you are corrupting that history through random receipt wombling then you'll end up getting offers for items you wouldn't normally buy. YMMV of course...
I actually take this further and (low value) items that I don't want to appear on my bonus list, I purchase separately without using my Nectar card.