You can find it good or bad what CoinHunter did, but it's not illigal. You may use MIT-licensed code and re-distribute a changed version under whichever license you want. You just have to leave something like "contains Bitcoin code (http://blabla, licensed under MIT license)".
I took a bit of a look at that. CoinHunter broke the terms of the Berkeley DB license. Berkeley DB may only be used in FOSS projects, unless he pays Oracle for a commercial license.
CoinHunter's closing the source means he can't use Berkeley DB, but he still is.
Does Oracle know about this? I wonder how long it will be until someone tells them?
"Hey, Larry? Some mythical wolf beast guy on the internet says someone's using BDB in a closed-source project to make personal profit, and we've got like 10 e-mails from people who say the wolf beast guy told them to mail us."
I think Oracle would care way more about some companies (bitparking, ruxum, mooncoin) using BDB a closed-source commercially project. Companies are way easier to sue and they can be sued for much more money.
However, these companies have been saying they are building from source, and bdb is included in most linux distros.... so the
" It does not include source code for modules or files that typically accompany the major components of the operating system on which the executable file runs."
part would apply for them. They could and probably are building against the dynamically linked version included with the OS. So they are fine as long as the are not redistributing what they are building.
