Our site is more than one year old. The site's PR was 3 and we were in the top 10 for our 10 most wanted keywords search.
Recently we submitted our site to directories (ca 700), bought a lot high quality featured links and added new unique articles to the site (once a day) .
And now the PR fall to 2 and site position is 30.
We added many external high-quality featured links targeting the site in a month. Could this be the cause of the site sudden drop?