Is Rxrelief card a scam

It's a rare breed.

It provides a real benefit to the consumer who uses it by saving them money on prescriptions.

It exploits the consumer using it by harvesting data about health and drug usage, most likely useful to the Health Insurance industry.

My interpretation of this is that this is a very expensive program to run for "free", someone is making a profit here and it's not the consumer.

Recommend to avoid unless you have no alternative.

Someone should investigate the type of data harvested. Presumably it is in some gray area of HIPAA.