Vistaprint have a subsidiary company, that operates entirely independantly from Vistaprint, but it just so happens that the company uses space on the Vistaprint website! The subsidiary is called VPRewards I think. When you order online from Vistaprint one of the final windows you are directed to as you complete your order has a tick box, blink and you'll miss it!
You have to untick the box if you don't want their privileged membership costing you £9.95 a month, which they will take from your credit card. The default is set to tick. So you have to deliberately decline membership, or they take your money.
They rely on people going back onto the site to browse other products before closing, so you miss the fact you have agreed.
But of course big companies can't afford to "rip off" their customers! Ho Ho Ho