1. it's a very big board, powered by IPB 3.4
I always used a big robots.txt, so I block all the irelevant content (profile, statuses, print, reply etc)
2. After this "drop", the traffic was not affected; it raised.
3. Since then, it was high, but something happen around 10 April...
after this date smaller and smaller ever day.
We are always affected by "secret/strange google updates"
See the images:
1. Any ideea on the big index drop form the first week of the year?
2. What happen around 10th of April?
I saw something disturbing in the last 3 years:
1. Forums results got very low ranking on the "google-blog-love era".
2. After the "google-blog-love era", blogs got lower, but forums results disappeared from serps!
It's not about my board, it's about almost any topic!