Elon Musk's companies pay each other hundreds of millions of dollars a year, according to SpaceX's S-1. ODD ANDERSEN/AFP via Getty Images The newly public SpaceX S-1 reveals how closely Elon Musk's companies are connected. Last year, SpaceX was involved in more than $660 million worth of payments, goods, and services with the ventures. Here's a look at how SpaceX is intertwined with Tesla, The Boring Company, and more. Step right up to Elon Musk's financial merry-go-round. Tucked more than 200