Heroic (Netherlands) interview questions

They asked for: "5 acts that you’d like to sign and why" (1 page business plan on every artist mapping out how you would develop them in the next 1-2 years), a 360* marketing campaign for a forthcoming single, and "a new marketing vertical, tool or idea that we would benefit from", totaling over 15 pages of full useable data & research. I understand wanting your perspective hires to prove their knowledge, but the extent and depth to which they wanted me to work felt MUCH more like they were taking advantage of my background and knowledge rather than getting to know me and my ability. It was an absurd workload for any interview, and for reference: I've interviewed at a range of establishments all the way up to Silicon Valley Fortune 500 companies. Never before have I been asked this large of a workload, especially without compensation. It felt very unprofessional and a violation of my value proposition and level of experienec.