We all know that after the Amazon A9 update it became very hard to rank products fast page most top positions. I heard too many Merchant says that " I've spent huge money and time on SEO but didn't get my product on 1st page". Spending money and valuable time on SEO and doesn't get expected results is a common matter now.
Here I'm talking about some facts about why your product's rank doesn't boast or you're not getting your product on expecting position on 1st page.
First of all freelancers from our country (BD), India, Pakistan, Philippines are using old traditional methods like purchasing, Wish lists, and Reviews in an unsafe way (I'll describe SA safety later).
Now Amazon is very very strict about Reviews and Purchases. Those accounts that charged a minimum of $50 by a debit card or credit card only can submit reviews. That means discount reviews are not allowed. Moreover, Amazon delete fake reviews initially.
Purchase is the most dangerous and effective method for ranking up and boosting sales. If Amazon gets any hints that you are making fake purchases from both FBM and FBA surely your seller central will be penalized permanently.
So only Wish List isn't working well to rank a product on Amazon. But it's good news that even A9 update other SEO tricks like Shopping List, Gift List, Gift Idea, Weeding Registry, Add to cart (as a gift), Sponsored Add Customers Impression, Vote, SF is working well better than yet and rank 1st-page top position effectively. So you need to do those with Genuine Mainstream SEO which is effective.