I think most of people here are forgetting one painful yet important aspect of the clauses in the contract.
1st - Be god-damn realistic. Outside of the cream of the top of the webnovel (and even it that case, I doubt it would have any other meaning) your books when compared to the size of the entire webnovel, are worthless. Don't worry, my books, books of most of my author's friends and most of the authors I even know about, apply to this rank.
Because it's easy to say, sign something only with the understanding it will be used against you. But that's not how the world works. Do you know what kind of insane uproar enforcing even a single of those rules would cause? Do you realise the size of the backlash that WN would face with it? Then unless you believe (and trust me, unless you are top3, you don't have any reason to do so) that you are absolute monster whose novel is worth more than the literal rest of the webnovel portfolio, then you don't need to worry about it!
What's more, EVEN IF a clause were to be enforced (because let's say for some reasons WN turn's idiotic as most of the people bringing up those clauses would like it to be). What do you think would WN do? Go for immensely costly lawsuit only to gain about 1% of its costs alone back (in case you were actually a big author in the first place, which let's face it, most of peps are not)? SImply because they would like you to suffer?
I'm sorry guys, but you are not (nor am I or most if not all the author's writing for webnovel) worth the effort to go for such length. If you breach the contact, you can just say byebye to your earnings, as you wouldn't get a single more promotion till the rest of your life. But let's be honest, if you are willing to breach the contract, you don't care about webnovel either way.