I submitted my application about a week ago and they replied to inform me that my application will be reviewed within 2 business days.
Just after a day I received an email that my application is approved "as a first stage" and to inform me that another email will be sent to me to complete all requirements needed for approval.
Then they gave me an Affiliate Certification Course & Test which I passed successfully. Finally they phoned me and asked about my traffic source. These were very easy and professional steps.
I am glad to start my ClickBooth CPA work today. Wish me a good luck guys