Apple Music or iTunes currently uses a lossy AAC format (i.e. Advanced Audio Coding format).
So, in theory, the main, main idea behind Mastered for iTunes (MFiT) is to address the issue of where the transcoding process from a lossless audio format to a lossy audio format doesn't result in more ISPs (i.e. intersample peaks which in real-life scenarios most people won't even care about).
It is recommended that you use a True-Peak Brickwall Limiter with the ceiling set at -1 dBFS because the encoding process can add tiny amounts of amplitude gain to the program material.
Let's now be realistic here, a boring song is a boring song, period. Whether it is mastered for iTunes or not. So who cares? Ummm, no one I guess.