>>klyrs+(OP)
That says he asks for permission. His new song would generate songwriter credits and they’re paid out totally differently from regular royalties. Is that what you mean by him paying for rights?
>>hluska+xd
Rereading your comment, I see that my answer rather falls short of your question. I don't claim to know anything about Weird Al beyond what he wrote on that page.
>>klyrs+fq
Honestly pal, I really appreciate you trying! I’m one of very few people strange enough to care about the minutiae of this. I’m grateful that you jumped into my weird rabbit hole with me for awhile. It was kind of you to try to help me.