"Our intention is that Raspberry Pi Connect will remain free (as in beer) for individual users with non-relayed connections, with no limit on the number of devices. We don’t yet know how many people will need to relay their traffic through our TURN servers; we’ll keep an eye on the use of bandwidth and decide how to treat these connections in future"

Т.е. бесплатным обещают оставить только прямое соединение. Насчет туннелирования они подумают