I don't think the fact that OkC now has paid features invalidates their (sadly deleted) blog post. With OkC, you can still match up with someone and accomplish what you intend to (finding dates/partners) without pulling out your credit card. Some of the paid features might (and might not) make it easier or more efficient to find a partner, but you don't need to pay them to get value out of the site. The argument in the blog post is against sites that require you to pay to do anything meaningful with the site, and I think that point holds.