AI Video Effect Prompt Library (rendered in the captions as "Protipal") — $100,000 in sales in the first year · roughly $15,000/mo and rising · ~60% profit margin · zero advertising budget · revenue is mostly credit consumption rather than subscriptions, so the founder tracks videos generated per customer instead of MRR · 60+ video effects and prompts in the library · prior company (3D-model and AI-image dashboard) sold to a much larger company after roughly €150,000 of software spend over 18 months · ProvenStartups