Why can't I see the DropiziRank notation on BigBuy, BrandsDistribution or BusyX-Pro ?

The DropiziRank notation is only applicable to AliExpress. As other product suppliers are not marketplaces, their operating mode is very different from AliExpress' (different controls, delivery times, chosen products).  
Criteria taken into account in the DropiziRank scoring (number of orders placed with the supplier, average delivery times, clients' notifications on both supplier and ordered products) are only useful on a marketplace such as AliExpress.
 
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