It doesn't matter if he does or doesn't. FOSS is core to the ethos of Bitcoin. Anyone should be free to do whatever they want with the software, even if that means they can build their own business from it.

The best analogy I've come up with is relating it to censoring transactions. Even if you knew your transactions wouldn't be censored, you wouldn't be okay with a miner that chose to censor other's transactions.

So even if you wouldn't modify the code yourself, you shouldn't be okay with having the freedom of others bring limited from doing so who could.