You can create multiple "businesses" inside your Stripe account. It's a bit of setup initially but that's the best way I know. You don't need two actually separate businesses - you can use the same business details but use different trading names.
I understand your motivation. My point is that your advice on how to become a huge company seems a bit flawed - specifically because it ignores all the companies which failed even after following that advice.
Anyway, there is so little data on the topic that I don't feel anyone has good advice on it.
Some of the advice YC partners give seems harmful because of survivorship bias (Basic for the Altair -> Microsoft). I've seen some people criticise you for it, but I've never seen any of you address it directly. Do you mind doing so now?
In the context of your post, the key is hiring the best hackers. The problem is that it seems identifying good hackers is hard. You have to be one yourself! (http://www.paulgraham.com/gh.html)
But I suspect you could hire pretty good hackers, if not the best. Most people want the safety and comfort of a job, not wealth.
In Dennis's words:
Talent is indispensable, although it is always replaceable. Just remember the simple rules concerning talent : identify it, hire it, nurture it, reward it, protect it. And, when the time comes, fire it.
As you will have noticed, this is also a recipe to be a douchebag. But you will be one rich douchebag.