I do not understand

Today I played with booking.com and decided to indulge in the cities of Russia. The result is saddened. Yes, in Moscow and St. Petersburg everything is fine - for a hundred hotels. It seems that even the prices are adequate. But from the rest of the cities there are only: Kazan, Kaliningrad, Yekaterinburg, Samara, Sochi and Rostov-on-Don. Well, still satellite cities of Moscow and St. Petersburg appear for mass. And that's it !!!

Where is the third largest population of Nizhny Novgorod? Where simply Veliky Novgorod and the city of the Golden Ring? Where are Krasnoyarsk, Novosibirsk, Vladivostok, Irkutsk, Khabarovsk and Petropavlovsk-Kamchatsky with Yelizovo? Hey ?! This is for starters.
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Is there really no internet in these cities or hotels that are already packed for months in advance? Or, maybe booking.com, as a district provider, works with hotels selectively on a geographical basis - “oh, sorry, at the moment we have not connected your city yet, but you leave a request and we will contact you as soon as possible .. . "? Strongly doubt. Also, as I doubt that the situation on other hotel booking sites is any different.

Are the owners of the majority of Russian hotels so far from modern realities that they are not even interested in how it happens in the world with colleagues?

UPD. On horse21.ru, however, the situation is much better.