I'm not sure about specific popular 'dark saitama fanfiction' works off - hand. However, on some fanfiction websites, there might be ones that gain a following. Usually, the ones that offer a really unique take on Saitama's character in a dark context could become popular, like those that rewrite his origin story with a darker twist.
In the realm of 'dark saitama fanfiction', it could be a way for fans to deconstruct the typical heroic image of Saitama. For example, it might depict Saitama being haunted by his past, or having to make difficult choices that go against his original carefree nature. This type of fanfiction might also explore themes such as isolation, as Saitama's overwhelming power could potentially lead to him being estranged from others in new and darker ways.
To edit a story after posting, first check if the website or app you used has an edit feature. Sometimes it might be in the settings or right next to the post. Also, keep in mind that there might be time limits or certain restrictions on what you can change.
In most cases, you can. However, the availability and extent of editing might vary. Some might only let you fix typos or minor errors, while others might allow more substantial changes. Always read the platform's guidelines to know for sure.
Sure. However, the ability to edit might vary. Some sites give you a limited time to make edits, while others might have specific conditions or only allow certain types of edits.