It's not gambling if you win every time hehe. Let's see if there's any other arbers here. I bet you are all from outside of US, since arbitrage opportunities are very limited in USA as I know. (Correct me please if I'm wrong)
Arbing was golden 5-6 years ago. Not anymore. Too much trouble getting banned from books, open multiple accounts again in the name of wife, sister, mother, father, cat, dog, etc.
Just not worth it anymore.