Point taken, I guess i am looking more for a formula. Such as: If total interest in application, x, results in willingness to provide, y, amount of information

Point taken, I guess i am looking more for a formula. Such as: If total interest in application, x, results in willingness to provide, y, amount of information. This part i understand enough also assuming the constants being what is considered adequate. I guess the question was more relevant to persistency rates of usage as a result of y, the amount of information they have provided. If you have invested time and value in a system it would be difficult to just drop the system. Do these easy sign up places allow for the ability to add this information later. Since in most instances this information will make it easier to serve a better product by truly knowing who is the customer.