I find these things ridiculous. They are little flourishes, it's not the entire song or the key identifying part of the song (like the base line in "Another One Bites the Dust" for instance).
The most egregious abuse of music copyright for me is The Verve's Unfinished Symphony:
Equally ridiculous was the idea that Weird Al should pay anything for "Amish Paradise" parody to Coolio for "Gangsta's Paradise" ... it was itself an identical copy of a Stevie Wonder song!
https://www.youtube.com/watch?v=fPO76Jlnz6c