It's true some employees at the ethereum foundation had personal money invested in the DAO. Vitalik himself had a small amount invested as well. However, the Ethereum Foundation was not involved with the DAO.
> If it had been anybody else, they would have lost the money
This is idle speculation, and I personally don't think that's true.
> Apparently the DAO is dead, but they seem to have kept the money.
I don't know who you mean by "They" but neither the creators of the DAO, nor the Ethereum foundation has kept any money that was lost in this unfortunate incident. If you're going to accuse people of things please provide citations with evidence.