Read an Inspo brand; previously merged IDs resolve to its canonical ID. Retains complete domain, advertiser and social rows. The complete unpaginated advertisers roster is main-first. Associations are non-exclusive: the same stable advertiser ID can appear in several brands. main, official and attributed_ads describe this brand association; headline ad counts use the main advertiser, never a roster sum. Advertiser tracked flags describe this workspace, including coverage from another followed brand. Traffic history is fetched only with include_traffic=true. traffic_host must belong to this brand.