so the hackint irc network has a ban on all forms of Matrix bridging. It's a weird stance, since for a while, they even ran their own server with bridge. Then they suddenly stopped that, didn't even ask the Matrix team for support (they'd gladly help), and only leave a very short and vague blogpost https://hackint.org/#20181028_Matrix_Bridging_Sunset

It's so vague, and weird how they do provide an XMPP bridge for example