You could say that about literally any shady business. Imagine seeing a PDF proving tobacco leaders knew for decades that it caused cancer and saying what you did.
Being monetarily successful does not mean you’re good or shouldn’t be criticised.
Are Marvel films shady for being popular? Is HN shady for adding features which increase engagement?
HN actually discourages high engagement by having the front page items change fairly slowly (rather than algorithmically customizing them to each user), not making scrolling beyond that (i.e. pagination and the "latest" feed) any less awkward to navigate than it has been forever and actively preventing you from commenting too much within a given timeframe (which it doesn't actively disclose when you hit the limit). That's probably a bad example for something being "shady".