You don't seem to understand my reasoning but that's okay.Depends how you spin it really.
"the MK-IV as an exclusive ship is a blocker to piracy gameplay, so we've opened it to all players as a fix. Here's some paintjobs for the inevitably upset types who are holding the game back"
Works better than :
"Suckers, the EULA you agreed to says we can change it"
I am talking about respecting the word given, the reliability of a company at the commercial level and the sustainability of its customers' confidence for the future.
But if you don't understand these core values, that's okay as you will see for yourself in the future that Frontier will never unlock the Cobra Mk IV because it is a serious company and concerned about his reputation.