There's no official statement that says he reads fanfiction for sure. However, considering how engaged he is with various forms of online content, it wouldn't be surprising if he did. Fanfiction often has a passionate community behind it, and if he's part of that fandom community in some way, he might have dabbled in reading some fan - created stories. It could also be a way for him to get different perspectives on the characters or worlds he's interested in.
No, it's probably not a popular genre in the general sense. Fanfics in general can have a large following, but when you narrow it down to something as specific as 'pyrocynical gay fanfic', the audience becomes much smaller. There are many more common and broad - appeal fanfic genres out there. This one is likely only known and read by a small subset of fans who are really into this particular combination.
I'm not entirely sure specifically what a 'pyrocynical gay fanfic' would be about as it could vary greatly. It might be a fan - created fictional story that involves a character or person named Pyrocynical in a gay - themed narrative. However, without more context, it's hard to say precisely.
I'm not sure if they actually read fanfiction. There's no definitive information publicly available about this for both of them. It could be a personal interest that they keep private or it might just be a rumor.
In general, the Evangelion mangas are considered good. They expand on the anime's universe, providing more depth and character development. However, it depends on personal preferences as some might find the style or pacing not to their liking.