How much traffic would a well writen freesite bring
 

Assuming you had a well writen freesite that had all the meta tags.
Had niche specific text high on the page (away from tables etc)
Robots follow etc
Images had meaningful alt=
Maybe even images were named like teen-blowjob.jpg

What kind of traffic would this bring from search engines?
10 a day
100 a day
To hard to even guess
Well worthwhile

I know it is hard to quantify as it would depend where listed what niche etc etc.

Thanks

1 to 100 is a pretty good guesstimate.

But, the se gods are cruel and fickle.

The key thing with free sites isn't really how much traffic a specific free site gets, but the sum total of having hundreds of them out there. As the SE gods shifts one down in the SERPS for whatever reason, another likely moves up to make up the difference.

Yeah, I had an old one...one of my first ones...pretty shitty site, that somehow got Google's attention. I wish I could figure out what went right...I just enjoyed the signups that resulted from the SEO traffic. It faded quickly, however.