Vals Stor:
The scripts are always copyright protected not only by the author (the scriptwriter who may be other than the novel writer), but also by the production company, the channel etc
So there's no way the script to be leaked. As for the novel, it depends on the writer- i dont know if he/she still has copyrights or transfered the license to others, but in any case, the novel is already everywhere on the internet-i suppose legally.
Legally? Hardly. Totally pirated. Same with watching drama on Kisskh - the platforms raise revenue via pop up ads, don't pay royalties to the people involved in the drama (yes author is paid to release film rights to drama producers). I get why fans feel frustrated about paying subs to the content streamers, but piracy rips off the creatives the most. If an author has a web-novel published, it can be easily pirated without the author releasing copyright, and if the web-novel is picked up by a publishing company and published as a physical book, they doesn't give the distribution rights to the pirate sites because they can't collect revenue.
It sucks big time. Even the poor translators who are doing a good non-MTL job are actually violating copyright.