Drilling a few centimetres inside a rock provides a fresh sample that is free from the alteration that can occur at the surface as a result of weathering or radiation damage.

BBC: Curiosity Mars rover hammers into rock

Despite a small shrinkage in the number of free checking accounts in the sample, this kind of deal is far from gone.

FORBES: Free Checking Options Fewer, But Not Gone

Even if physicians consulted with their patients before enrolling them in free sample drug programs, the fact that such programs exist at all is evidence of market forces encouraging the use of prescription drugs.

CNN: Medicine in your junk mail