I doubt that very much. Consider these scenarios:

1. Call for free from home/couch with a regular camera in the privacy of my home.

2. Go to some location and pay a third party to do a less private call, and have a better visual experience.

The most obvious choice would be number 1 in 99.9% of all cases. In theory, privacy can be increased by creating a sound-proofed environment for your call, but in practice, that would easily become very expensive.