I am not sure whether it is signficant but the requirment canbe widened to require only compatible interests and interoperability rather than shared interests and architechtue.
If a blog poster used a language uncommon to the reader then the reader could still try to tease out meanings in the text without coordination with the writer. One could also assign meaning additional or adjacent to the meaning the sender intends to convey. If you ask for a water bottle, you are probably thirsty. So the fact that you are signalling something can be a signal for another thing.
I am not sure whether it is signficant but the requirment canbe widened to require only compatible interests and interoperability rather than shared interests and architechtue.
If a blog poster used a language uncommon to the reader then the reader could still try to tease out meanings in the text without coordination with the writer. One could also assign meaning additional or adjacent to the meaning the sender intends to convey. If you ask for a water bottle, you are probably thirsty. So the fact that you are signalling something can be a signal for another thing.