I've never even considered getting paid. I'm pretty sure the site doesn't break even for cost of the domain name yet.
I've been linking the Twitter articles instead of just the article itself because it tracks the number of clicks on the article. As you point out, it also makes sharing outside of RCF easy.
Its hard keeping this thing going because we don't have a good idea of how many people read these. I won't speak for the other writers, but sharing and commenting would help us make writing feel less like a chore.