The B2B Persona Project provides insights into over 90 B2B personas, revealing crucial metrics such as average tenure, annual churn rates, and the financial implications of maintaining email databases. Key findings indicate that the average churn rate is 15% per year, resulting in significant loss of value, and that higher-ranking individuals tend to stay in their roles longer. This study aims to enhance email marketing strategies by offering a deeper understanding of the core personas within the B2B landscape.