one of my site keep dropping ranking in this few days. all keywords drop out 100 today. What happen? I only use web2.0 +guest post from BHW seller for tier 1, GSA links for tier 2 & 3 For the guest post from BHW seller, I bought it for a long time....3-5 months before web 2.0 is built 2 month before. I just check with my web 2.0 by using scrapebox, they are all still indexed what is the reason for this issue? Thanks!