Anyone can create HN accounts to post any link and comment on any discussion, but certain accounts are dead on arrival, and votes from certain accounts don’t count, so you can pollute /new or discussions (especially for users with showdead on), but that doesn’t mean your content automatically get prime spot placement just by registering more accounts.
Meanwhile, clickbaiting is much more effective than creating accounts.
> but that doesn’t mean your content automatically get prime spot placement
That's not how it works. It might be a desirable goal, but that doesn't mean that the role of a content marketer is not to a) astroturf discusssions, b) generate content that's SEO-friendly even if they don't blow up.
Customers already get their money's worth if you get your minions sparking causal low-key discussions about their product/service/PR talking point on random places in order to raise awareness and focus on topics in ways that serves your best interests.
Meanwhile, clickbaiting is much more effective than creating accounts.