Supplementary Material Karlijn Dinnissen and Christine Bauer. 2023. Here, we include the supplementary material used during the work referenced above. The file DinnissenBauer_2023_Questionnaire.pdf contains: Informed Consent Agreement - An agreement outlining the goal and scope of the project, what is expected from participants, and how exactly data is saved and processed. Participants were asked to read the form, and confirm their understanding of and agreeing to the statements therein, prior to participation. Explanation - Clarification of concepts and points of view referenced throughout the questionnaire Main questionnaire - Questions regarding participants' experiences as a music industry professional - Questions regarding participants' view on music providers (artists or parties who provide music) and their interaction with streaming services - Questions regarding participants' view on music recommender systems (diversity, inclusivity, fairness) - Questions regarding participants' view on users (consumers of music) on streaming services, and their interaction with these services Metadata questions - Questions regarding general participant demographics and professional background information.