When Seth Rudetsky received an invitation to appear on Nikki Glaser’s podcast, he had no particular reason to think it wasn’t real. Rudetsky, the Broadway performer and SiriusXM host, gets asked to do podcasts all the time. Better yet, this one was offering him between $4,000 and $5,000 to appear. “Oh my God, they’re actually paying for a podcast,” he remembers thinking. A Glaser fan, Rudetsky quickly said yes. The invitation also seemed to know an awful lot about him. It mentioned his Broadway cruise and his work with Sara Bareilles — the kind of details that suggested somebody had actually done their homework. “All these specific…