Generally, an engineer wants their product to work well and work efficiently. They put effort into a product, and it feels good to see people benefit from that work. The ones making the decisions have money on their mind. If a FOSS version of their paid platform costs them too much money, they will shut it down. Not because it was the engineers decision, but because the one's making the decision likely don't even know what github is and just know it's taking away that sweet subscription money.