Cyberclean does not need to be cleaned. The special mass traps the dirt and bacteria and over time the Cyberclean then changes colour. There is a colour code on the packaging. When the colour has changed to the extent that a lot of dirt has been absorbed, the Cyberclean loses its bacteria-killing property. However, it still cleans dust. Cyberclean is intended for use and cannot be recycled. But at least the product is degradable.
I have weighed 1 packet and it weighs 82g. I think the 68g refers to the contents without packaging. I have a rating here with the picture where I weighed the pack. To your question: How many packets does the photo correspond to? Answer: 1
I have not tried it yet and would advise against it, especially on the lenses. Cyber Clean leaves a "slime layer" after application.
For a camera, I would just use water and soap. Cyber Clean is only useful for keyboards because it's hard to get between the keys.