3 question about startup

A question about startup deals / Hello everyone. I have a question that says what are the best free alternatives to Join Secret, a site that gives discounts but requires payment of $ 100; Do you have solutions to get the deals at a low price? Can I use the university mail for a student in something that will benefit me in building my company? The third question, can I get an educational domain (edu)? I learned that it is only for universities