It’s not clear what they’re trying to achieve with the present measure.

To be frank, I’m agreeing with your framing of the issue you did in your above comment.

"However, everyone should play fair. However, if no one is playing fair, how can you play fair? That would appear to be the dilemma, in the eyes of those core devs (including those at chaincode) who control the politically important github account(s?)."

I don’t know how to more describe the issue. For what they intend exactly you’re free to ask to https://github.com/morcos and https://github.com/sdaftuar.

It’s a real problem if 2 people in the bitcoin world, can decide who is allowed or not to contribute to bitcoin consensus change. And it will start to be a problem for them.