I’ve noticed this request a couple of times but they were over a year old and I wanted to see if any progress had been made. Just to be clear I would like to get notifications when a specific Twitter user starts following other accounts.
FWIW, in my industry (sports) this would be a very popular feature.
Hey there, 
No updates currently on when or if this will be implemented but I did add your vote to the feature request! This is the best way to stay informed if anything changes as we'll email you if this does go live:
There’s also a main thread where we’ll be sure to announce any changes:
In an effort to streamline communication, I’ll be closing this thread for comments but feel free to follow the above mentioned thread if you’d like notifications within community regarding this. 
Sorry to not have better news here but definitely appreciate you flagging this!
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