It's a newbie question but maybe not so newbie question. How do you power up your PBN links? We know can't spam them, so what do you use for tier 2's for a PBN link? In the past, I used article directories, but there have to be better ways to do them right now without hurting your PBN's. Maybe Web 2.0's like Wordpress, Tumblr, etc? Any ideas?