AdsTopics Balanced: the 50/50 high/low YouTube-search seasonality dataset

3,021 Google-Ads-taxonomy topics; worldwide monthly YouTube-search interest 2008-01..2025-06; balanced high/low labels against tau=19 (the training-years median rate over all topics); the per-topic champion atlas, the machine-generated scoreboard, the live platform predictions, and the complete protocol source (src/balanced.py). Companion dataset of the ArtaQuest Journal of Seasonality submission High or low: a balanced benchmark for the seasonality of YouTube search across the advertising taxonomy.