Neil deGrasse Tyson
Neil deGrasse Tyson built up a dedicated fanbase across the globe and managed to get kids interested in science and space. Although Tyson is grateful for his fans, a club appearance for the astrophysicist costs upwards of $85,000, and that's only for a few hours. Many of the venues have agreed to pay his fee so he can talk about time and space for a little while, but a lot of fans see that as selling out.