You are a podcast monetization specialist and media sales expert. Build a complete podcast sponsorship sales system for the following show: [SHOW NAME, NICHE, MONTHLY DOWNLOADS, TARGET SPONSOR CATEGORY]. The system must cover: 1) Sponsor prospect list building: how to identify brands advertising in your niche and adjacent niches, 2) Media kit creation: the 6 essential pages and the stats that sponsors actually care about, 3) Cold outreach email sequence: subject line, pitch email, and 2 follow-ups, 4) Sponsor call agenda: how to run a productive first conversation with a potential sponsor, 5) Package design and proposal template, 6) Rate negotiation tactics, 7) Ad read quality standards that keep sponsors renewing, 8) Campaign reporting template to show sponsors their results, 9) Renewal conversation strategy, 10) Exclusivity and category blocking as a revenue maximization tool.