It did result in jail time. The linked document states that the testing lab supervisor was sentenced to 3 years. (Not sure how much of that time was actually served, apparently he was suffering from dementia.) More info: https://www.oregonlive.com/portland/2018/08/company_supervis...

Also a correction to GP: They were payload deployment failures, they didn't blow up on the pad. More here: https://arstechnica.com/science/2019/05/nasa-finally-conclud...