I checked http://api.ooni.io/api/reports for instances of the bridge_reachability test. There are many between 2014-03-01 and 2015-05-28, but they stop after that. Is there a reason for that, or did the operators just decide to stop running the test?
About 80% of bridge_reachability tests come from 5 ASes: AS47172, AS29182, AS21341, AS31575, AS4538. I suppose that those represent only 5 instances of ooniprobe. Could it be possible to make the bridge_reachability test run by default?