sequire caplital - building product using data
https://www.sequoiacap.com/article/building-products-using-data/
social capital - accounting for user growth
https://medium.com/swlh/diligence-at-social-capital-part-1-accounting-for-user-growth-4a8a449fddfc
carrying capacity
https://medium.com/@keithie/web-and-mobile-products-understanding-your-customers-d8ee1e56b5a3