It's a trap. You, owner of a shop, don't do this. Amazon will first analyze all your sales data, they will than attach reviews to your shop and finally they will oblige you to play by their rules or die (banned or killed by bad reviews) and either way they will grow thanks to your hard work. I'm not joking, this is exactly what they have done (and keep doing) with "partners". Amazon is all but transparent and it has…
Within a few years cheques will be phased out in the UK. This means the only way to pay a carpenter, or a plumber is in cash or a money transfer. Money transfers to new suppliers always take a bit of faff to setup, and a card payment like this would often be easier.