Reactionaries and tech billionaires are fundamentally different kinds of people. Reactionaries are deeply pessimistic about the future, and want to return to an allegedly more just society from the past; tech giants, on the other hand, are optimists, and think improved technology is the solution to all of our current problems. So why are some of the billionaires gravitating to the reactionary side?
Because they have common enemies. Both sides think the “coastal elite” and the “administrative state” are hamstringing them with rules and keeping them from creating the purer society that they envision. The purer society may be different, but the obstacle is the same.