WordPress-Editor-iOS

That's a good reason to include license terms in each file. I don't think that Wordpress people were malicious here. The LICENSE file usually contains the global licensing terms (as seen in many GNU projects). Each source file should still contain the license or a mention of the license. MIT-like licenses are usually put verbatim in each files, while verbose licenses like GPL just get a pointer to the LICENSE file. On some files, the MIT license is correctly present at the top of the file: https://github.com/wordpress-mobile/WordPress-Editor-iOS/blo...

Actually, the LICENSE file is for their project (which amusingly, he seems to have gone from the original GPLv2 to MIT a year earlier: https://github.com/wordpress-mobile/WordPress-Editor-iOS/com...). Even at that time, the source code included from the other project seems to have the embedded MIT license notice (e.g. https://github.com/wordpress-mobile/WordPress-Editor-iOS/blo...). And in the README.md they have attribution, mentioning the licenses of the underlying dependencies. tl;dr: The LICENSE file is for this project, not the underlying libraries they copy-pasted in (which other than say the png files, seem to have their MIT/BSD info in them).