If you need to reach the top for certain queries, you can put "heavy" links with anchors on the pages you are promoting - for this purpose, article links on non-blogging blogs and links from PBN are excellent
Putting only article anchor links on a page can sanction you for over-spamming. In such cases, also deliver anchorless "easy" links from forums to show search engines the naturalness of link promotion.
It is important to promote the individual commercial pages of the site and the homepage (the host page). The site builds up DR, and link weight "spills over" from the homepage to the internal pages, boosting them in searches.