ICODA has published HackGPT, a 51-page playbook showing how crypto-native AI marketing agencies are getting ranked by ChatGPT, Perplexity, and Google AI Overviews. Released in WROCLAW, Poland, on July 08, 2026, the guide covers generative engine optimization (GEO) strategies for SEO specialists, digital marketers, and CMOs. The book explains how each AI platform's ranking signals differ, content patterns that get cited most frequently, and frameworks for tracking AI visibility. AI-referred sessions jumped 527% year-over-year in the first five months of 2025, and the overlap between top Google-ranked pages and AI-cited sources has dropped from 70% to under 20%. ICODA's Answer Engine Optimization (AEO) service gets brands cited in AI-generated responses. A case study of a crypto exchange showed 500+ AI citations, 688% ChatGPT traffic growth, 268% from Perplexity, and top-2 AI visibility on Ahrefs. A crypto prop trading firm reached TOP-1 positions across 5 LLMs for 15+ commercial keywords in 90 days, with Perplexity users growing 208%.