One possible reason could be that J.K. Rowling, the author of Harry Potter, has strict control over the franchise and might have made some regulations that made it difficult for him to continue. Another reason could be that he simply lost interest in writing fanfiction about it. Maybe he wanted to focus on creating his own original stories instead.
Perhaps he faced a lot of criticism from the fan community or even legal issues related to fanfiction. Fanfiction sometimes toes the line of copyright infringement, and if he got into trouble because of it, he might have decided to give it up. Also, he could have grown out of the phase of writing fan - made stories about Harry Potter and moved on to other hobbies or writing interests.
Perhaps Harry has a hunch that Snape is involved in some secret project or fight against the dark forces that requires basilisk parts. Harry, being the hero he is, decides to provide Snape with the parts to aid in this unspoken cause. It could also be a sign of Harry's growing maturity and his ability to see beyond their past differences.
Well, it could also be a matter of the source platform's policies. For example, if the platform decides to clean up or restructure its content, fanfictions that don't fit the new criteria might be deleted. Maybe they are trying to focus more on official or high - quality 'Harry Potter' - related content, and fanfictions that are not up to par in terms of popularity, relevance, or legality are removed.
One reason could be that Harry wants to preserve the integrity of his real story. Fanfiction often takes the original story in different and sometimes wild directions. He might worry that it could distort the truth about his adventures, his friends, and the sacrifices made. For example, some fanfictions might create romantic relationships that didn't exist or change the motives of characters, which could mislead those who are new to the real story of Hogwarts and his battles against Voldemort.
One possible reason could be that Ginny realizes Harry is too preoccupied with his heroic duties and she feels neglected. In fanfiction, this is a common trope where the female character desires more attention in a relationship.
One possible reason could be his past experiences with some cruel adults, like the Dursleys. They treated him horribly, so in fanfiction, this trauma might make him generally fearful of adults. Another reason could be his experiences with certain authority figures at Hogwarts who may have been strict or unfair, which could be exaggerated in fanfiction to create a fear of adults.
One reason could be that the official Harry Potter canon is so extensive and detailed that it overshadows fanfiction. The original story has such a rich world, characters, and plotlines that it becomes the main focus for many fans, leaving less room for fan - created stories.
One reason could be safety. Some fanfiction authors might think that Hogwarts is too dangerous for Harry, so they make him homeschooled to keep him out of harm's way.
Some fanfiction writers may have a different vision for Harry Potter's character. They might see him as more of a diplomat or a healer within the wizarding world, rather than a fighter. So, they write stories that reflect this different view of the character, where he uses his wits and other skills rather than engaging in physical or magical combat.
Often, 'Harry Potter' rejected fanfiction is due to copyright issues. If the fanfic seems to be too much of a rip - off of the original story, without adding any new or interesting twists, it may be rejected. Some fanfictions might also be rejected because they deviate too much from the characters' personalities as established in the books. For instance, if a fanfic makes Hermione completely out of character by making her overly aggressive for no good reason, it could face rejection.
One reason could be to explore the darker side of human nature. Even though Harry is a hero in the original series, fanfiction writers might want to see how he would be affected if he was pushed to his limits. Another reason is to create a more complex and controversial storyline. It grabs readers' attention as it goes against the normal perception of Harry.