[jefftk]

Not necessarily: all ad networks try to filter out spammy clicks before billing, and some advertisers work on a cost-per-action [1] basis.

[1] https://en.wikipedia.org/wiki/Cost_per_action

[htrp]

fb/google for the most part won't give you cpa... they will let you set cpa targets (which often miss horrobly) but still bill you by the click.