>the ability to commission a finished product into a Matter network in the field mandates certification and membership fees,[15][16] entailing both one-time, recurring, and per-product costs.[17] This is enforced using a public key infrastructure (PKI) and so-called device attestation certificates.[15]
To be clear, this is the same organization that developed Zigbee, which requires paid certification - without, you're not allowed to say the product supports Zigbee or to use the Zigbee logo.
You can connect devices without this, it just shows a warning during commissioning that the device is not certified. No impact whatsoever.
So by analogy, Zigbee is like USB in that it encourages certification through trademarks, while Matter is like HDCP or Blu-ray in that it enforces certification through technical means (cryptographic signatures)?
Thank you for the clarification?