From their site:
OpenAI is a non-profit artificial intelligence research company. Our goal is to advance digital intelligence in the way that is most likely to benefit humanity as a whole, unconstrained by a need to generate financial return.
The money quote is at the end, literally—$1B in committed funding from some of the usual suspects.
If you don't believe that a foom is the most likely outcome(a common and not unreasonable position) then it's probably better to have lots of weakly-superhuman AI than a single weakly-superhuman AI.
Even in that case, whichever actor has the most processors would have the largest "AI farm", with commensurate power projection.