I am running an obfs4 bridge on my raspberry pi since 10 days now and haven't seen a single client since then.
My torrc looks like this:
ServerTransportPlugin obfs4 exec /usr/bin/obfs4proxy
From the logs I can read that the obfs4 service is listening on port 39147, so I have port forwarded it along with port 9001.
The self-test is also positive:
Jul 07 13:38:56.000 [notice] Self-testing indicates your ORPort is reachable from the outside. Excellent. Publishing server descriptor.
Jul 07 13:39:00.000 [notice] Performing bandwidth self-test...done.
Is this completely normal behaviour and due to the fact that bridges are not listed publicly? Are there simply not many obfs4 clients around? Or is it a misconfiguration?
I'd really like to contribute to the tor project as best as I can, and due to having low bandwidth running a bridge seems the only way.