The tax issue is the most powerful issue in American politics going back to the Tea Party. People say 'Oh Grover Norquist has power.' No. Grover Norquist and Americans for Tax Reform focus on the tax issue. The tax issue is a powerful issue.
I do a little fact checking now and then. Other than that its impact is simply that email has revolutionized communication for me and my website has built up a community of readers which is a lot of fun.