Felix Danczak is Head of Strategy at MonetizationOS. He co-built and exited Zephr, the subscription platform for publishers, in a 10x exit to Zuora, then ran Zuora's global marketing through its $1.7B take-private in 2024. He advises VC and PE portfolios on AI and growth, and is the author of Market-Led Growth: An Operating Model for Business in the Age of AI (2025).