I'm not saying that if youtube isn't taken down in a month that he won't release it. i'm just saying that he will give it plenty of time before releasing everything.The number of people who can use this exploit is only limited by whether the YT app is available or not. Releasing the exploit before or after it's taken down doesn't affect neither positively nor negatively the reach of the exploit.
Smea may want to wait a few days until more people get their hands on the app, sure, but delaying its launch until the app has been removed doesn't maximize its effectiveness. In fact, releasing it before the app is gone from the eShop may be benefitial, as it may give it more and better publicity by showing a working, tangible exploit.
But, then again, Smea works in mysterious ways. He'll release the exploit whenever he feels it's the time to release it. Everything else is pure speculation on our part.
If you would release it directly, nintendo would almost immediately take it down from the shop since they then know for sure that the hack exists