Can someone explain to me better how HQ linking actually works?

[Duedman]

HQ distribution supply:
• HQ supply = 0 will have a distribution supply value of 3
• HQ supply 1 or 2 will have a distribution supply value of 5.
• HQ supply 3 or 4 will have a distribution supply value of 6
• HQ supply 5 will have a distribution supply value of 8.
• HQ supply > 5 will have a distribution supply value of 10.

This.
But these are just the values for the boosting HQ.

For the receiving HQ it is

• HQ supply 1 or 2 will have a distribution supply value of 8
• HQ supply 3 or 4 will have a distribution supply value of 8
• HQ supply 5+ will have a distribution supply value of 8.

So the receiving HQ can create 8 supply from 1, whereas boosting HQs can only create 8 supply from 5
This is the not so intuitive part.

[OldCrowBalthazor]

HQ distribution supply:
• HQ supply = 0 will have a distribution supply value of 3
• HQ supply 1 or 2 will have a distribution supply value of 5.
• HQ supply 3 or 4 will have a distribution supply value of 6
• HQ supply 5 will have a distribution supply value of 8.
• HQ supply > 5 will have a distribution supply value of 10.

This.
But these are just the values for the boosting HQ.

For the receiving HQ it is

• HQ supply 1 or 2 will have a distribution supply value of 8
• HQ supply 3 or 4 will have a distribution supply value of 8
• HQ supply 5+ will have a distribution supply value of 8.

So the receiving HQ can create 8 supply from 1, whereas boosting HQs can only create 8 supply from 5
This is the not so intuitive part.

Thanks for this. I copied and pasted this into a response for one of my viewers who had questions about supply in a match on YT.
It was regarding an interesting situation in the Tikhivin area in the TRP-World mod, where the map is near identical to the WiE map:
https://www.youtube.com/watch?v=Tpk2XWh9RnU&t=2460s