The quartetsplashed down safelyoff the coast of Florida on Saturday.
Isaacman also pledged $100 million and Musk added $50 million.
When a Twitter user asked why the president hadn’t acknowledged Inspiration4, Musk hopped into the replies.
Congratulations,#Inspiration4!
With today’s splashdown, you’ve helped demonstrate that low-Earth orbit is open for business.
The White House did not immediately respond to a request for comment.
Inspiration4 is the latest in a string ofpioneering space tourism missionsthis year.
