far as i can remember, all they did was hoard tech or keep the south of the Mojave safe, depending on what you did. although, there is also the option to [censored] them over, but... its hard to fight through an army of 50 heavily armored tech worshipping maniacs. i know cause i have been one of them b4.
That may be true. But the slideshow and the BOS themselves tell you they mass-produce them.
"With its logs cleared and its systems upgraded ED-E remained a vigilant and constant companion to The Courier. The Brotherhood used the information recovered from ED-E to create a small army of Duraframe eyebots."