Re. the former, I would start by reading e.g. http://idlewords.com/2015/11/the_advertising_bubble.htm http://idlewords.com/2015/11/the_advertising_bubble.htm an

Re. the former, I would start by reading e.g. http://idlewords.com/2015/11/the_advertising_bubble.htm http://idlewords.com/2015/11/the_advertising_bubble.htm and http://idlewords.com/talks/internet_with_a_human_face.htm http://idlewords.com/talks/internet_with_a_human_face.htm