It honestly depends on your plan and strategy.
Cory Doctorow for example leverages the Creative Commonsto drive sales of his print and eBooks.
Alternatively, there's Dean Wesley Smith's advice on selling short fiction: http://www.deanwesleysmith.com/?p=7143
What's questionable though with the OP's post is why would you publish an unedited story for free? (And then offer to edit it for the sale work?) As a reader, your stories, free or otherwise, is my gateway into your writing. If I see it riddled with errors, why would that entice me to read more of your work?
Second, there's a difference between anthologies and collections, and it's a pet peeve of mine when people interchange them. True, casual readers won't know the difference, but there is a difference.