Im just wondering man what's your benefit in telling such bullshit ... I suppose that you want to sell some service in future/you are already selling some service here (I didin't check your accoutn history and I dont feel to do that) and you are just building your reputation among kids who have mindset "earn fast" and will want to pay you money for some mentoring or anything like that.
Okay but why your methods that you "have been using" for reviews are not working :
1. To be able to post amazon reviews your buyer account HAVE to have transaction history of over 50$ in last 12 months using valid CREDIT CARD (not gift card).
2. Orders that are sent as a gift dont show up as verified when you try to post review afterwards.
* Amazon doesn't let product to have more than 20 unverified reviews since last year. It displays notification that "this product received too many unverified reviews lately(...)" and after all no one is able to post unverified review on your product.
3. Your method of using gift card will not work because your brand new will get blocked when using VPS/VPN.