Amazon Affiliate- weird traffic method- Is it legal?

I got few Amazon Affiliate sites, with product review and others. I think they are quality, there are few articles with 2000+ words for each. I did seo, site gained some traffic, but I figurated that they might be some others way to gain users. I don't know legally of it, but don't want to ask Amazon, because they are not friendly to review site.

-Post and boost my page in niche related forum.
It's simple, post some content from my site with info, from which site the info are copied.

-Boosting Twitter/Facebook/Youtube comments? Finding a post related to your niche and answer for some question as first? Maybe little boosts with it, can Amazon detect it as spam

Some of you tried to this method? Is Amazon hunting site for this kind of weird spam?

As long as what you post is a link to your site, and not an affiliate link to amazon, you are good. It is, in fact, a very good source of traffic: https://www.blackhatworld.com/seo/m...on-newbie-friendly-phase-5a-published.832879/ (Search in that post for "Phase 5a - Driving Traffic - Forums")

If you post directly your affiliate links in forums or social media you'll be banned from Amazon.