It seems that the DND list is growing which is fine.
You need to realize that some companies own 50+ websites. Most companies own at least 5+ websites. So even if there are 100 websites on the DND list it is likely that only 2-3 companies don't want to be discussed here ;).
It seems that as the net of DND is tightened by the day, the actual purpose of forming ES loses its rigor.
IMO, all companies that are discussed here benefit either indirectly, directly, or both:
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Indirect Impact: Domain name mentioned in the forum increases the domain's reputation score and defines its theme in search engines. Since the forum is 100% devoted to discussions about essay writing / essay industry / essay writers, it helps search engines categorize the domain correctly in their indexes and increase their rankings. The knowledge about the powerful indirect impact is known to SEO experts only, but it doesn't change the fact the impact is there ;).
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Direct Impact: If the outcome of a discussion is neutral or mostly positive, the direct benefit is right there. It is very unlikely a forum visitor who is trying to decide if to order from websiteA.com is going to read all posts about websiteA. Most potential clients don't like to write and read (especially complaints written in broken English ;-). Those who don't know any particular website can just find a random topic and decide to order from them. If a website is not mentioned anywhere at all, there are zero chances of finding them.
That's not all. I think the most important deciding factor in ordering from websiteA.com that has been discussed here is the fact that the website is... discussed AT ALL. That is a guarantee that works like an extra insurance; if something goes wrong, the client can go back to the forum (or let the company know he/she will go back to the forum if problem is not solved) and try to resolve the problem. Personally, I would be leery of ordering from a website that is afraid of public scrutiny. Even if the website has great reputation, there are chances something goes wrong. Then what? Complain to managers who ignore your emails? Or call the police? Hmm...
I've read some great companies (unrelated to the essay business) actually PAY disgruntled customers and former workers to give them specific details on what went wrong and how to improve it in the future. While they won't be able to safe every relationship, they may be surprised at how many customers they can rescue. That is a smart way of getting closer to perfection.
It would be even better if ToS are reviewed in a way that have greater security for all the companies operating in the essay writing industry so that they are not worried about their names being defamed.
If there is a legitimate complaint, there is no way of avoiding negative comments.
I think there is a big misconception about "competitors trying to destroy each other by posting libelous comments." From my experience, only a handful of topics (out of a couple of thousand) have been actually started by "a competitor" trying to put another website in a negative view. And it was usually a former disgruntled writer of the website, not the company itself. If anything, most negative topics about websiteX have been started by a few of disgruntled clients of the website. I believe a client who is not satisfied with the service has the right to complain and by customer rights standards it is not equal to defamation.
Besides, it's doubtful an actual competitor would want to waste time / resources AND risk potential lawsuit just to "defame" websiteX. EssayDirectory.com lists thousands of websites providing exactly the same service as websiteX. By "defaming" websiteX, there are very little chances a potential client would order from the "defamer," so his/her efforts would be both very risky and fruitless.