2:29 `He who has an ear, let him hear what the Spirit says to the churches.'
He who has an ear, let him HEAR what the SPIRIT says to the churches.
This and the remaining 3 churches place the "Hear and Heed" section (see format) after the blessing section or at the end of the letter.
These four churches also contain references to the soon return of Christ. Thus these four churches may represent types of churches which will be active at the return of Christ.
If that is the case, then the admonition to "Hear and Heed" may be more needed than the promised blessing.