Earlier today I attempted to follow my own account on infosec.exchange, but never received a notification on my account there, which partially explains why my requests to follow a couple of accounts there haven't been accepted. My own request still shows an option to "Cancel Request."
Anyway, I contacted the admin (Jerry) over there to ask if he knows why, but figured I'd follow-up with you too just in case there's some sort of safe or block list that infosec.exchange is/n't on.