Awful look for this company. Imagine international students /H1B holders who turned down other offers to join Flexport, and now may not have enough time to get another offer before needing to permanently leave in 60 days.
Or, imagine smart, young Americans trying to make a living in a high cost of living area like the Bay Area, having their life FUBAR'd by a selfish exec. Most likely as they just told their previous employer that they're leaving that company.