Yeah, lieing is probably the only way. Unless they physically come round to your house and follow you 24/7 for about a year they will never know if you own the product opr not. And if anyone rings you (i am a worldpay customer and they have never rung me btw), you want them to think you have the products anyway.
Oh, does anyone know if worldpay allow transactions from more than one site. i.e. i already use them for one site, will they say 'shut that other site' if i made a new site and directed the payments to my current world pay account?