how to view comments on netflix
// Credit to: Caesar Wong
// Answered March 7, 2016
// Source: https://www.quora.com/Why-doesnt-Netflix-have-comments
Allowing comments isn't as "trivial" as it might seem - i.e. simply adding the feature by installing some new code on the website to enable it. With any kind of user-generated content you need to consider what can potentially go wrong, and there are so very, many things that could potentially go wrong with user-generated content.
The main considerations are not IT issues but business ones:
What framework do you put into place to ensure that the community of users participating are getting value from the discussion, as opposed to trolling each other (and Netflix) for shits and giggles?
How do you implement that framework?
How do you stop spambots from overwhelming your website with spammy posts (and avoid picking up false positives, which would be poor user experience)?
Where do you draw the line between free speech and censorship?
What do you do about harassment of users without banning someone, and therefore potentially losing them as a customer?
Each of these questions (and a lot more like them) is potentially a cost - hiring staff moderators or outsourcing the function, having lawyers and business analysts going through the possible outcomes, etc. For a business that seeks to run at optimal efficiency to deliver value through content distribution, comments are a distraction.
This is in contrast to a business model like Vimeo's, where they are trying to attract user participation because that's what gives value to the videos that are uploaded there.