He means whenever someone uses @INovaeFlavien he’ll receive a notification about that post. Could become spammy.
Personally I don’t think that’ll be much of an issue. I expect people will refer to people as IA, Keith, Jan, etc and only go to the (minor) effort of using the @FullUsername tag when they think it’s warranted.
Newcomers who might think a tag is warranted when it’s not are probably going to be unaware of who the devs are, and unaware of the @ tag feature anyway.
It will take some time before i can translate the old and new names in my head. But good to see that some people are on board that have always contributed top notch stuff. Makes me very optimistic regarding art style and visual quality.