torjoy:
The making of a bridge authority desire is from the observation that here in South America we haven't any authority and I think this can help tor to improve the network metrics on South America side. Also maybe in another countries too. Of course, all the current authorities are good but maybe we can improve it inserting more bridges online. I'm operating 3 bridges and one middle-relay for now and all have good metrics but the bandwidth measured is lower than i've set, maybe putting some authority here we can improve the metrics of all relays here in South America.
I believe there is a misunderstanding about bridge authority, tor directory authorities (for relays) and bandwidth authorities. There is currently only one bridge authority AFAIK and I have doubts that adding one in South America benefits what you are trying to achieve.
If we look at the available bridges over time [1] we can see that the tor network never recovered from the hard and somewhat unplanned switch from the previous bridge authority even though it is more than a year ago.
So yes, I believe it would be beneficial for redundancy reasons to have more than one bridge authority but that is probably a big task.
[1] https://metrics.torproject.org/networksize.html?start=2017-01-27&end=201...