Also, remember what happened to Adria Richards and her explicit mentions of her employment at SendGrid. In both Orth's case and her's, they greatly damaged customer trust for their employer, which resulted in firings.
They're slightly similar cases but still pretty different. Adria Richards was a spokesperson for the company, that was her official role, Adam Orth was not. And despite that, Orth's comments hurt his employer because people took them as official, whereas Richards' hurt SendGrid not for that reason, but because people disagreed with her actions and therefore wanted her employer to take action against her - i.e. the backlash was to punish her, not because people directly blamed SendGrid.