traffic cost to me $0.11 adsense earings $0.22 so my revenue was $0.11 - ROI 200% ... i think i should write a book "how to become rich with adsense"
Well I didn't want him/her to phone his/her mum sharing the news of 200% ROI when it turns out to be 'just' 100% Accountancy tricks aside, it's a great figure! Repeat that on a magnified scale (invest $1000!) and laugh all the way to the bank. Then try and make it 200%
Congratulations. Well done. I think that if you invest more your roi will decrease. It can be only a part of a cycle that everyone will click or sth.