Heirs? Kickstarter isn't a dynasty by any stretch of imagination. High performers in tech are in fact allergic to unions. I guarantee you that the highest paid FANG engineers would never in a million years even consider applying to a unionized tech company.
Do you know how hard it is to already weed out underperformers in large tech companies? I wouldn't be surprised if half of Kickstarter's engineers pumped out fewer than 3 PRs a week. Only the underperformers will choose to stay in the long run.