Hypocrisy is the world we live in. One can argue tho is that at least with an uncleared sample it was turned into a completely different genre and derivative work, making it distinct from the original piece (Not necessarily always the case especially when nikkas loop, replay, and interpolate samples). With Mac Miller he took a hiphop instrumental and made a completely new hiphop song. Do I necessarily agree with LF, idk mane its hard to say. Put yourself in his shoes, if you made a beat and you go on youtube and a nikka makes a completely new song out of it with 23 million views and he's touring and making money you may feel a certain way as well. At least in LF's case he told them to put his name in the title if and they would have been cool but they aint even do that. Once you see them $dollar signs$ the rules start to change. Which is the same thing that happened with sampling, originally people didnt care because hiphop was just seen as a fad with no real potential and then BOOM the shyt exploded to be one of the biggest genres of music and all of a sudden lawsuits started flooding in and everybody wanted a piece of the pie