Let me start by explaining how i got into using adsense on my sites and then i will come to the actual topic as mentioned in the title of this post. I started a technology website back in 2004 to share my learnings online. I had no intention of earning anything from that website so it was just like a personal website with technology related articles from my area of expertise. I never did any SEO and i did not know anything about it either until much later. I used to occassionaly track my stats using awstats provided by my hosting company and that too once or twice a month. After about a year or so, i noticed that i had about 20-30 visitors daily and that got me a little excited about who is visiting my website, where do they come from and what do they search etc. I started monitoring my stats more regularly and even did some onpage optimizatoin as well for better search engine rankings. 

One day after many weeks when i checked my adsense account, i was over the moon noticing quite a bit of earning and so many clicks and even alot of impressions, i started digging into how did that happen. Looking into my stats i noticed that my visitors have jumped from 20-30/day to 2000 / day, and that was the blessings from some links from a website which was at the top of my niche infact the very best one and it had page rank of 9 also and so i got my first cheque from google and i got excited and started working on my website more seriously and more consistently, i added 10-15 more sites to my network in last 5 years and i have been honest following all the rules mentioned by google and i never felt my account to be in any real threat for anything, despite the fact that some of my websites got hit by spammers and attackers but it went on strongly until very recently.

I fixed the issue, took some more measures to ensure that such thing does not happen again, but i did not apply for getting advertisement enabled for that site.  ads serving continued for another 10 days and then it stopped. I was inclined to have it enabled again since that site had about 5000 daily visitors and that generated some revenue which helped me pay the servers i am hosting my websites upon, but i decided that i should take this as an opportunity to experiment with other networks and have some comparison so that  i know whats going to happen if my account gets banned. so i am doing those experiments now for which i will update in my next few articles.