Big Brand Ungating

After researching multiple forums, i’ve decided to give up on ungating Nike. From my understanding, even if you are able to get lucky and submit an invoice from a wholesaler/distributor that is accepted and are technically ungated and allowed to sell you still aren’t “authorized”. Meaning you need a Letter of Authorization from Nike themselves which they aren’t giving out. Is this the case for all brands (i.e Under Armour, Crocs, etc)?