One common time limit could be a word count limit. Say, you might have to tell your story within a certain number of words. Another could be a time duration limit, like having only five minutes to tell it. Sometimes, there might also be a limit based on the number of events or plot points you can include.
In all likelihood, 'No Limits' isn't a true story. Stories often blend imagination and elements to engage the audience, and this one could be no exception.
Blockade and forceful promotion of novels referred to the way online novel platforms promoted certain popular novels.
Blockade referred to the platform blocking the link or recommendation space of certain novels that received much attention, forcing readers to read the novel in order to increase the popularity and number of readers of the novel. This method usually appeared on certain platforms.
Strong promotion referred to the extreme promotion measures taken by the platform for certain novels, such as recommending the novel to all users in a short period of time or giving the novel a high degree of exposure and publicity to increase the popularity and number of readers of the novel. This method usually appeared when the platform monopolized the promotion of some popular novels.
It was important to note that blocking and forcefully promoting the novel was just a way to promote it, and it did not necessarily mean that the quality or value of the novel was problematic. The quality of the novel and the reputation of the readers were the key factors that determined whether the novel could be promoted or not.
Most likely not. 'No Limits' seems to be more of an imaginative construct. Writers often come up with compelling stories from their creativity rather than real-life happenings.
One plot idea could be Yami going on a solo mission to a mysterious and dangerous land. He has to face powerful new enemies and discover secrets about his own past. Another could be Yami training a young and inexperienced magic knight, sharing his unique combat and magic knowledge.
Yami remains alive in the manga. The author chose to keep Yami as an ongoing character to drive the story forward and interact with other characters in various scenarios.
As far as I know, Yami doesn't die in the manga. The story might have twists and turns, but that particular event hasn't happened yet. Maybe there are rumors or speculations, but based on the official storyline, no.