Sideshow offers free shipping now?
No. Some YouTubers/reviewers are sent figures for free to review and either get to keep the figure for free just for doing the review or pay a discounted price to keep the figure if memory serves. I could be wrong but I believe that's how it worked in the olden days.
As for Jheda, it depends on if Sideshow sent him the figure to do the review or if he bought it himself but still got some $$ as an affiliate for doing the review. Again, I could be wrong and I'm no reviewer, that's just how I remember it working years ago.