There are a bunch of these projects now, focusing on more recent posts. None for older ones. Two questions:
- How old is old? Two weeks? Past payout?
- How unsuccessful? Is there a specific number of votes or a dollar amount threshold above which it would be considered successful and thus not eligible?
Definitely past two weeks. After two weeks, you might get a few votes or a comment, but that is all (usually). This shows that a post is truly not getting any more action.
On the successfulness, it is really based on judgment. I'd say for the most part, under 50 up-votes and under one dollar. Users can submit whatever they want, however. For example, of a post got 150 up-votes, but only 3 dollars, it is extremely unlikely that it will make the list, but not impossible. If it was the best Steemit post I have ever read in my life, I would include it, because it would definitely be undervalued. That is only an extreme example though, I don't expect that to happen. I am mostly looking for posts that have about 15 or so up-votes and zero dollars.