Maybe, just maybe I will do this. I have the PHP knowledge to do it, so I might just try it out.
Nah, I don't support this. This is MyBB Support, it'd be better off for a 3rd party site as Tim said.
If it is a 3rd party site, you would need to advertise it or endorse it or something. Else it'll just die.
The Elite, this is a support site but it's also a community just like any other website. Take away this community then you just have questions & answers and no friendliness and fun.
Well actually, let's kill two birds with one stone. How about MyBB allows only direct related sites to advertise (Paid of course) on the community. Then the thirdparty site could host it.