Yes, companies do integrate virtual communities. The extent to which virtual community is integrated vary based on company type ( For example General Electric and Google and totally different companies). For more details, how companies can integrate multiple stake holders in decision making and initiative you can see below articles.

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And in tourism area in which part the companies can integrate the virtual communities??? I ask this question because I think it's so difficult to Co-create value in services

Abdou Ep Nouri Amira I am not expert of tourism but I strongly feel that tourism is largely dependent on government regulations and government flexibility. The companies play a very small role in tourism.

However, online communities involvement is not compulsory if you are thinking they might be from other countries. Customer reviews/views can only be used for designing a strategy, the co-creation value includes all stakeholders in decision making. The online communities are an asset for every company. Please have look of below presentation, how offers and business model is decided based on personas and feedback of customers [ Its not related to tourism, however you can see at as an example]

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