The backlash against California’s proposed Billionaire Tax just took an unexpected turn. A website promoting a “March for Billionaires” appeared this week, featuring the slogan: “Vilifying billionaires is popular. Losing them is expensive.”

Many assumed it was satire. It isn’t.

The event is scheduled for this Saturday in San Francisco, and its organizer has now stepped forward to confirm it’s real. The San Francisco Examiner identified the organizer as Derik Kauffman, founder of AI startup RunRL and a former Y Combinator participant. Kauffman says the march is entirely self-funded and not backed by corporations or industry groups.

Despite the attention, Kauffman admits he’s unaware of any actual billionaires planning to attend. He expects turnout to be limited to a few dozen people at most.