This doesn't mean that either executive is a cheerleader for Trump. As recently as November, Musk said that Trump was "not the right guy" for the presidency. Kalanick, meanwhile, joked that he would move to China if Trump won. As with the imminent tech CEO meeting with Trump, this is likely about making sure their voices are heard in a White House that isn't necessarily sympathetic to their views. Musk, for instance, wants a quick move toward clean energy and electric cars -- a stark contrast with a Trump camp bent on protecting the fossil fuel industry and denying evidence of human-made climate change.
This isn't to say the Forum additions aren't raising eyebrows. If you'll recall, Musk worked with Trump transition team member Peter Thiel when the two were leaders at PayPal. It's been over a decade since Musk and Thiel were so closely linked, but it's hard to ignore the connection. And Kalanick may well be happy with Trump's choice of Elaine Chao as the head of the Department of Transportation. Chao isn't a fan of federal-level regulation or worker's rights groups, which suits a ridesharing company that sometimes skirts the law and fights tooth and nail to avoid treating its drivers as employees. Even though they have clear objections to Trump, they also have some skin in the game.