From a TechCrunch article published yesterday, following an interview with John Borthwick:

"According to Borthwick, it would have cost “hundreds of thousands per month” to keep the site running on its old platform. Even though the site was state-of-the-art just a few years ago, most of the infrastructure would be considered legacy technology by a modern startup."

That's why. SF Weekly, and the author Keith Plocek, obviously did not reach out to Betaworks before running this article.