I attended a free speech event in New Orleans where he was a panelist. He is a psychologist, but also does research on Google, et al, because of free speech concerns. He spoke in depth about Google’s activities. Afterward, I contacted him to get involved with the research. I was looking for alternatives to Opera and Gmail at the time, and he sent me a list (lost when my hard drive was attacked). Brave sounded good from a simple description. I also changed to Protonmail, which is working out great. Epstein has written a number of articles on Google’s behavior, censorship, potential election manipulation, and so forth. I think the recommendations he sent me were from one of the articles.
Incidentally, the free speech event was held at a restaurant that I chanced to visit again last week. The bartender told me that the owner of the restaurant received death threats after the event. There are a lot of folks like myself looking for a more secure internet experience free of political manipulation. Standing room only at that event.