In the course of discussion I think a few important parts of the series of events were forgotten:
What happened was that MPC used a piece of MIT licensed code (which was perfectly fine and normal, we all do it, jQuery is MIT licensed code as well). Not only did MPC credit the creator of that code, but also intended on donating some profits to that author.
But the author of that MIT licensed code, after noticing that MPC had made a product using it that had made some money, decided to “change” the license and then contact MPC to ransom him and demand amounts of money from the product (fairly substantial amounts) using scare tactics, false accusations, and threats.
Since then there’s been 2 lines of discussion:
first: legally can he do that? (the answer unambiguously being “no”, the MIT protects you from that, that’s one of the reasons it was originally conceived and written, that’s been discussed to the point of beating a dead horse and you should read from the beginning to learn about that part of the discussion)
second: morally it was always right to both credit and monetarily reward the author of that MIT licensed code for their contribution, no one argued against that. But after that person’s ridiculous behavior MPC is a little less willing to do so than he originally was. And honestly none of us were on the receiving end of the threats and accusations being put forth by that programmer, so I say we shouldn’t judge or attempt to judge MPC for feeling that way.