Is it clickable? As in do they get Click-through rate (CTR)? Otherwise it is really hard to calculate any value for these.

I have never seen a person walk up to a billboard and click it.

I've never seen a person click on an ad.

	▲	chrismorgan a day ago \| parent [-]
		I have seen people click on ads before—by accident, due to a terrible close button or UI shift.