5 should certainly be "common sense".
But there might be a need for a D in point 3, which is fresh content...LEGAL fresh content. There are far too many sites that recycle old content or throw up tons of pics that are illegally obtained via emule or similar.
The oversaturation problem...you'd think it would be a deterrent, but it's not. Of course, then you have 5000 sites of fail because they're not doing anything any different than anyone else, and the big guns have all the goodies and all the traffic that the copycats only wish they had. And even as such, coming up with something unique isn't easy, as virtually everything has already been covered. I was fortunate to stumble across an untapped market and a fledgling market at the same time and I hope to capitalize on both, but it's not going to be without a shitload of work and I already both know it and accept it.
I don't think my wife could be a porn star. Her sisters, maybe, but since neither are willing to try, it becomes a no by default. And I'm certainly not gonna try to be a porn star. :D
Someone should make one of these threads about "what it takes to secure models", as things are very different now than they were 10 years ago when I was a content shooter. I'm sure plenty of people, including me, could use some pointers.