BridgeDB stuck at 500 bridges

Why is 500 the magic number for max bridges we have ever seen?

https://metrics.torproject.org/network.html?graph=networksize&start=2009-01-01&end=2010-10-12#networksize

Is there some bug that is preventing us from getting more relays? Or is this just a reporting issue?

We could try to ask people to run 100 bridges on the mechanical turk to see if it changes: https://www.mturk.com/mturk/preview?groupId=VZ2CYWR61R3MWRXH8S00

Verification of the job would be to provide a working, usable bridge line.