> They obviously don't have beacons on the client side
Says who?
Client side beacons would have to be implemented in the git client, and making parallel requests. I've seen no evidence of it myself, and I'd think people would freak out if found inside git's source.
They obviously don't have beacons on the client side, I wonder if it's based on statistics, at this time of the day on a Tuesday we should be getting x requests but are getting only x/n.