Some time ago I participated in some Startup Accelerator. Was part of Startup with really fast growing user base, but small amount of sales. What some investor

Some time ago I participated in some Startup Accelerator. Was part of Startup with really fast growing user base, but small amount of sales. What some investors really suggested to do with our database - is to sell it! So companies can sell personal data (and they do it) not only when put up for sale, but at any time.