we had "Identification Cards" that we always carried to identify us as representatives of the WT
Even when I was first associating in the 1990s we still had those, but they disappeared not long after. I was surprised at the time as I thought it was a good idea, making us more "legit" and "official" to householders, just as any service approaching people door-to-door such as gas and electric engineers, plumbers, police, etc, have ID cards to prove their origin. But now I realised the org wanted to cut the potential legal commitment and implications they brought.
As for the OP's comment that "R&F JW's ARE agents of the org" - that's now "old light". The article you quote is over 70 years old! The GB 2.0 have made it abundantly clear that you're on your own these days when it comes to anything like:
- Witnessing from door-to-door or using literature trolleys
- Writing letters to neighbours
- Social activities - they even specifically said that no social events should be called 'congregation gatherings' because they are not authorised as such by the org, as I recall.
The removal of the publisher ID card was another step to cutting any apparent 'official' authorisation from the org.
Even the revised second baptism question says "Do you understand that your baptism identifies you as one of Jehovah’s Witnesses in association with Jehovah’s organization?" - note, not "as a member of", but just "in association with" - a weasel-phrase which could be interpreted as loosely as possible when it suits.