In article
,
xscope wrote:

Just placed an order with screwfix, which came to ?45, and a few
pence.

Realising that free delivery is for orders over ?50, I was looking
around the for something about ?5, which would essentially be free
(given the otherwise ?5 delivery charge).

Then I spotted - vouchers, so I added a ?5 voucher, which hey presto
takes me above the free delivery threshold, so I get the ?5 to spend
next time.

So I order a £5 box of screws and £40 of vouchers to get free delivery.

Next time, I want a £5 hammer with free delivery so I pay £5 and use the
£40 vouchers to buy another £40 of vouchers to get free delivery.

And so on and so forth...

Would this work?! Would they let you?!

Isn't it the free delivery equivalent of a perpetual motion machine?