Ok I have got some results, good ones I guess.
Last night, i commented on a video from CNN. The video was awesome so my comment was simply, "awesome"
I got around 300 likes and after this I told myself I will wait until morning to check it out.
When I woke up, I verified the comment and from my fake account it was nr.1 from top comments.
I logged in to my real account, checking the video and I saw that my comment was nr.3
Also, I asked a fried of mine to check it out too(different IP) and he told me that he sees my comment on as nr.3
I work in SEO industry but I still can't explain how my comment isn't nr.1. But the good news is that we still have some visibility here. As long as people don't need to click on "Show more comments" we are fine I guess.
Note that I didn't post any link in the comment, it was relevant and simple.
I will start from now making new fake accounts and do only 1 comment+like boost per 24h writing something relevant and without a link. However, I will tell people something like: "Go to my profile and follow the link, come back after and hit thumbs up if it worked for you

"
ps: apologize for my not-so-good english.
pps: I bookmarked this topic and i will come back after more testing it's done& will share it. Hopefully something worth reading.