When you read the terms and conditions of Stack Exchange (which is I see as nothing more than a vanity product for mathematically inclined people with delusions of grandeur), you realise what an outrageous system it is. The Stack Exchange owns all your intellectual property!! That is the ultimate vanity product dressed up as a sel ess community-spirited venture. They can ride o the coat tails of all your work and ultimately publish aggregated material for a fee and you get nothing. You can put on your CV that you have such and such a reputation but it amounts to nothing in dollar terms for you. I have better things to do with my time than support a business model that is so o ensive to people trying to understand mathematics. But given that stumbling on a good response (which do exist by the way) is a bit like a random walk, do you feel lucky?