Propose all uses of the "brand_name_imitation" tag to include the brand being imitated as a tag and updates to the wiki listing for the tag accordingly.
This is not standardized between uses of the tag; some posts reference the original brand, some do not.
For example, https://danbooru.donmai.us/posts/855357 includes both "brand_name_imitation" and the brand being imitated, "pokari_sweat," whereas https://danbooru.donmai.us/posts/1704461 includes "brand_name_imitation" without including the "sapporo" tag.