As for acquiring from other exchanges, they take in both USD and BTC in fees. They all have enormous BTC stashes as a result.
But any part of that revenue that is left over from expenses will be taken out by the owners as profits.
So you were thinking of the individuals investing in SaveMtGOXco, rather than their companies?
Profits don't go straight to the owners. They are corporations, they go on the balance sheet.
I was also talking about the investors literally 'depositing' (I doubt they really deposited, but instead more likely were just given contracts with unlimited funds and told to write a check at the end) money on the exchanges and buying BTC on them as well, though. I think it's likely that happened.