Is it worth targeting traffic with no cost per click price assigned?

[timetoplaysomegames]

Hi, I wanted to ask, is it worth targeting long tail keywords which don't have a price associated with the CPC, example in the photo. Or to put it another way, is all traffic worth targeting regardless of CPC?

I was basically going to target long tail keywords which have a decent CPC with medium to low competition but i also wondered if it was worth also targeting high volumes of traffic with no CPC, I wasn't sure if i get paid per 1000 impressions on pages which have no CPC assigned to them?

Thanks for reading. 

Alex