But I don't think this is more likely than paying by creditcard: the post can accidentally deliver my receipts to the neighbours, or family members or visitors can accidentally see it.
Please, take $3 and pay something on the Bitcoin Accepting Live Cam Site in my signature with a credit card.
Than, You will be billed.
Make for all us a screenshot, and show, how it can be linked to the name of Live Cam Site, where You spend those $3.