Adult Script Pro Community Forums

I've been doing research on starting a tube site, and a pattern seems to have formed.  Many people get into this business and boast about their tube site they're doing, but often when you see a thread that's a year or two old (not just here, but in many forums I've seen), the sites are down.  Why is it that people invest all the startup money to get the scripts and then a year or two later, their sites are nowhere to be found?  Is this just a really difficult industry to break into, or is it entirely a lost cause?  Or perhaps, it's something simpler than that, such as, it's still possible to be a newcomer and become highly successful with a tube site, but people are not willing to work at it?  My assumption would be the third of the three, but I'd like some clarification on this if possible.  I'd like to get going with a tube site, I like what I've seen from Adult Script Pro, but two things are keeping me from locking into a decision about this script.  The first thing is Adult Video Script, and the second is Smart Tube Pro.  All three scripts look great and I see features from each that I really appreciate.  I hear Mechbunny is great, too, but anyway...

So yeah, my heart is 102% in creating a tube site that will eventually replace my full-time job.  Is it even possible with a premade script such as this, or is it just some fairytale fantasy?  I don't want to be "Just another Tube Site", so I have several ideas already in mind, for how I can be different.  I don't expect for anyone to say "Oh, you can make $1,000/day in 6 months if you work really hard on it" or anything, but rather, just let me know that it's possible to enter the game with a premade script (which will be modified over time via outsourcing (until I get a grasp of PHP syntax)), as a small fish in an ocean full of sharks, and come out successful.  I'd consider "successful", when I can earn at least $300/day from this.  Of course, when I hit that point, I should be able to more easily scale up from there.

Anyway, this trend I've noticed....  Does it only apply to the weak -- the ones that either didn't put a solid prolonged effort into their business and / or gave up before they achieved success?  Or do even the committed ones falter into the inevitable abyss?