The question is referring to the use of a protocol when it is bought back when people actually use its protocol. Depending on the type of protocol, the number of people who use it could vary drastically. For example, if the protocol is a cryptocurrency, then the number of people who use it could be quite large, as there are a lot of people who use cryptocurrencies for various purposes. On the other hand, if the protocol is a more specialized type of protocol, then the number of people who use it may be quite small. Additionally, the number of people who use the protocol could also depend on the quality of the protocol and the popularity of the product or service that it is used for. Ultimately, the number of people who use a protocol when it is bought back will depend on the type of protocol and the popularity of the product or service it is used for.
