→ skos:prefLabel → "Скрытый доход"@ru, "Hidden revenue"@en, "Versteckte Einnahmen"@de
→ skos:note → "The logic that the user is responsible for the income of the business is abandoned. Instead, the main source of revenue comes from a third party, which cross-finances whatever free or low-priced offering attracts the users. A very common case of this model is financing through advertisement, where attracted customers are of value to the advertisers who fund the offering. This concept facilitates the idea of 'separation between revenue and customer'."@en
→ od:hasNumber → "21"