I find it interesting that the owners of the Russian broadcast feel it is worthwhile to operate on an HD subchannel, without a translator that would make it receivable on an ordinary radio. Apparently they have a number of on-air personalities.
While it of course also streams online, the station's website emphasizes the HD frequency. Perhaps this is an indication that many of the radios on newer cars now have HD capability.
This is more like the pre-HD time when many ethnic broadcasters leased SCA channels. The listeners acquired or rented SCA receivers. Today, listeners of highly specialized HD formats will make the outlay for an HD radio to hear programming of that sort.