They refuse to sell Chromecast and Apple TV - including listings from third parties. If you contact support, they will lie about it (it's out of stock, we temporarily withdrew it due to customer reports, we're not allowed to sell those products - never would they admit a ban). And it's just to promote their shitty Fire/Prime offering (searching Chromecast has a top result of Fire TV).
So they're definitely trying to be anti competitive.
So they're definitely trying to be anti competitive.