When the movie industry slapped adult films with an XXX rating, porn companies came to embrace the scarlet letters. But when the nonprofit corporation that oversees Internet addresses rolled out the .xxx domain, the reception was unequivocally unenthusiastic.

Manwin, one of the porn industry’s largest companies, is challenging Icann, the Internet Corporation for Assigned Names and Numbers, in an antitrust suit over the new domains. And while most other porn companies haven’t rushed to join the legal fight, they’re watching closely.

Read more at CNBC.com