[Fuxy]

I find it fascinating that Elon Musk hasn't chipped in since even though it's a competitor to SpaceX it is ultimately a step in the right direction for his goal of putting people on Mars and into space.

Hell he could take the engine and build a new spacecraft based on it.

[ceejayoz]

I think he's happy with the engines he has, as well as the ability to say "here's what we're doing" without someone else having the final say.

[goodcanadian]

Also, as rich as he is, he is not made of money. His wealth is tied up in SpaceX and Tesla.