We need people who dont procreate. Imagine if everyone started procreating, chaos! or maybe not...

He can make people feel better or worse about themselfes using the internet. So in a way even if it's indirectly so, he can still contribute without really physically contributing. He's able to influence someones actions/feelings by using the internet much like you do while physically meeting with someone. Sure the impact might not be as big as with you meeting someone IRL, but at least it's something. It's almost impossible NOT to contribute to this world. Every little thing we do has some sort of impact on the world around us, no matter how little it may be.

He still consumes food, drinks, energy, buys computers, internet and mini fridges...Basically everything he spends money on is another mans/womens earnings.

Hope that makes some sense.