@SumTingWong
Amozon is the 3rd largest advertising and tracking network in the world in terms of traffic on its own website
It is as
@oldschool says first-party ads and server side tracking. It is the largest on-line retailer (with AliBabi) in the world. They can always track you when you log-in. Blocking first party advertisements and server side trackers could also prevent you from getting deals and discounts or break something in the pay & purchase flow of events.
You could add the first line of the picture below to your My Filters and check whether you have My Filters enabled in My Filterlists.
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