A federal judge Friday refused Visa's request to be dismissed from a case that claims it conspired to help MindGeek, parent company of the website Pornhub, profit from images of child sexual abuse. In a separate case, The Walt Disney Co. filed an antitrust lawsuit against Visa and Mastercard late Friday that is an offshoot of a 2005 lawsuit against the credit card companies over interchange fees, which they charge merchants for every transaction and pay to the bank that issued the card.