Add follow notification flag to Helix
The follow notification flag is very helpful for loyalty bots to reward users for having notifications turned on. Notifications are a huge part of having users re-engage the broadcaster, and being able to reward that will bring more viewers to the stream. This was present in Kraken, but not in Helix.
Adding "following=0/1" or something similar to the tags of user-triggered events (such as PRIVMSG, USERNOTICE, and USERSTATE) and a USERNOTICE on the actual follow event of a user would be an easy way to accomplish this and provide a little extra detail. It would be especially useful for bots that have "follower-only" commands. Otherwise, a time-consuming API request has to be made between the command and the response.