Quick question - I'm doing some PBN's for myself (just learning) and I was wondering is there any application to white hat SEO with expired domains? I do SEO for small businesses and I keep a very clean line between "white hat" and "grey hat". Only white hat for clients. In doing research for my PBN I have found some excellent domains that would be perfect in the niches of some of my clients. Just wondering if there's some opportunity I could offer to my clients that would be "white hat".