I could've sworn the United States Literacy rate was above 90%.
He didn't say, "If there is enough demand for it, we'll consider enabling Sandbox gamemode."
He said, "Sandbox is very prone to eating system resources. It is unlikely to ever be available on launch for that reason."
No matter how much demand there is for Sandbox, it costs money to obtain sufficient resources to host it, and even if current resources are sufficient, it's slow down and/or make other servers impossible.
There is no further reason to reply to this thread, if something comes up to make this possible, I'm sure Wooty would notify the community.
As of now, his last words on the matter stand, and no amount of necroing this thread is going to change that.
Heck, if I were him, I'd be even less predisposed to enabling Sandbox mode.
Just sit tight, and if something happens, good for you guys, just know it's unlikely and move along.