@ "yertari" - when you press 'checkout' on your site, it asks for your email and password. I'm not sure what this is - if it is asking for your Paypal logins (which is what I am assuming) then this may (and probably will) affect sales as the purchaser is putting this info into your site's form rather than your site calling the relevent Paypal page and the purchaser entering that info directly into Paypal which, as far as I know, is the norm.