Definitely familiar with it, I used to use Metafilter quite a bit. I think it's an interesting approach, but overall I disagree pretty strongly with requiring

Definitely familiar with it, I used to use Metafilter quite a bit. I think it's an interesting approach, but overall I disagree pretty strongly with requiring people to pay to access the site. That cuts off a huge amount of people that can't justify spending $5 to be able to post. It's great from a perspective of reducing issues, but it also hurts the site and community in a lot of other invisible ways.