I got this email from CJ,

Advertiser Lens.com has noticed that you have driven 2,297 clicks with no impressions and no commissioned transactions so far this year.

Then I shut down the site which ran Lens.com affiliate program because I thought it was just lots of clicks from one of small visitors, CJ reply my email with this crap sucker answer,

We will have to decline payment for this month and recheck the traffic in a bit.

Isn’t that a whole point of CPA, getting clicks and complete transaction?  If it was CPC, I understatnd there is a issue, but I just don’t get it that CJ hold my commissions from Other Vendors. 

Update: 

Well, after several emails, got this one from CJ..CJ Holding not decline..hmm what a difference.

The commissions are still there. They are still part of your overall balance. It
just means that the payout this month was declined, and if things look good in June which I hope they will then that payout will include what was not paid out this month.