Re-using Used Lifters on Another Cam

Basically it’s the cam that failed and ate the lifter, well maybe not. The lifter didn’t spin so it ate the cam. But why didn’t it spin? Maybe to tight in the bore or too much spring pressure. Cam ground wrong. Too long of a pushrod. Not enough zzdp in the oil. I’ve seen a few cam and lifters fail. Not mine thankfully. Kim