Yikes. What a mess.
However, I honestly don't care if she wrote it or not, give Gaga her Oscar.
I just find it funny that the monsters are using excuses like
"SHE HELPED!! THE LADY SAID SHE HELPED! THAT MEANS SHE WROTE IT!!!" when y'all know you regularly drag other artist who even get a hint of shady songwriting credits. If any other stanbase was like "She may not have written it but she helped with the overall mood, so that means she actually wrote it!!" you monsters would tear them apart.
Admit it, if Linda said "I heard the demo of By The Grace Of God, it was for another singer, Katy just changed a line." The Monsters would be calling Katy every name in the book, and praising Linda.