And it is not true, that costumes would not by dyable for non-subscribers - they are, using dye stamps, which will be separately available in the crown store with preset color schemes.
In this B2P game, expect to pay real currency for character customization. It will be either directly with Crowns or via ESO Plus. This is no secret, it is the stated purpose of the store. Would it be
I actually provided feedback to customer support once I also finally was able to raise a ticket, about why they 'hide' the ability to contact customer support!