S/o's somewhat cumbersome scheme to aquire comment points to be able to answer was a awkward kludge in the principal problem of open contribution sites, namely that human slop and gamified tactics tend to kill the site. It probably was effective enough to keep things working for a long time but it could not recruit new users (not just readers) as fast as it needed to. It doesn't seem like the points based system really helped as many devs find jobs as it would have taken for the site to become a recruiting tool. It probably would have had to shift and evolve in several keys ways to survive