The short answer is "No But" this is because anything can be shared over a distributed WAN , including Internet access.
Networks set-up by groups like Air-Stream Wireless are not about provisioning Internet Services. Although there are multihomed and internet services accessible on the network it is important to note that membership is not a fee-for-service and any service that is available has been volunteered freely by a member or a participate community groups.
Put simply individual members or participating entities may use the network to share their Internet Service with others or their own members. Provided there are no financial rewards involved (eg: offered freely without condition) and without any agreed or implied service guarantees.
If Internet Access is your main requirement we recommend you contact a reputable ISP in your area.
