You could just use blogs and websites like Hacker News, twitter, etc to advertise yourself, I personally ignore any emails which are sent to me advertising some

You could just use blogs and websites like Hacker News, twitter, etc to advertise yourself, I personally ignore any emails which are sent to me advertising some kind of product. Unfortunately after years of phising scams and other similar email based issues, I do not trust anyone online enough to "check out their cool new product".