Why Adsense with several clicks but earning = 0 ???

Is there any reason why I earned USD$0 with 7 clicks now under one of my channel?

The other channel earns me $0.20 for same 7 clicks.

Is it because of clicks from so called Tier 3 counties like Thailand, Bosnia...etc?

I got more visitors from Thailand, Bosnia, Czech these 2 days.

 

Maybe due to the invalid click

 

Invalid click can cause this one. Please read Google adsense TOS

 

What about Smart Pricing, maybe this is the cause.

 

invalid click, is if the click from other country that rejected by Google
i have experience about this too

 

Too many possibility regarding this case..we just can assume, only google know why

 

Invalid click = $0.00 value , getting clicks from tier 3 is not the issue but if user click ad and close landing page of ad immediately before it loads or if clicker of ad do not surf sub pages of ad landing page than its considered as invalid click . google have very advance technique to detect invalid clicks

 

but the other channel with earning appears at the same time as USD$0 earning channel. I think invalid clicks will affect both channels.

now that i hv extra 2 clicks with the earning channel, CPC = 0.045.

no extra clicks to non earning channel now, however...