What info does a paypal subscription send ?

Hi,
I've a legitimate paypal account with my credit card with my real address etc I use for ebay. But I don't know exactly what info is sent if I subscribe to something like FindNot for example. Is there any way I can subscribe to them using this account without them receiving address details etc ?
To my knowledge the work the same as Anonx, a payment company deals with the payments and the only info kept on the FindNot servers is username/password/paypal subscription ID. But I'd rather my details aren't sent anyways.
I don't want to be bothered setting up a separate paypal account though, because the only way this helps really is if you have a "gift" credit card thing and even then they have your IP anyways so trust is required to use the service no matter what.

Thanks for the info,
Cheers.