i have a site with almost 900k pages indexed by google. i used to have about 4-5k unique per day. but all of a sudden during last week it start decreasing with about 1k per day. until it was nearly down to nothing. im clearly not banned by google since when i do a site:domain query it says there are about 900k results. can someone please shed some light on what could have happened? i really dont get it.