Thanks to the Internet the whole world can be involved. No need to reserve hotels or spend money on commuting. Every company could introduce such a thing for their benefit. Examples include: training the vendors, conducting the conference and serving the customers.
Musical events, conferences, fashion shows, meetings, fairs, or festivals of all kinds, from education to street theater is a good opportunity to exist in the network. Why create a show for 100 guests in the hotel room if you can do it for 1000 and more?