I have one established site that is an active forum which has around 2500 UV per day and makes around 7000 pageviews. I was thinking to add adsense for domains to this site. Could someone please clarify these. Will i lose my PageRank (current pr is 3)? I tested it for 1 day and found ecpm was well over $50. Is it good or bad. Will Alexa Rank Drop? Will Traffic drop Subsequently? Will Google indexed results number drop?