To me this looks like a bad attempt at exposing dirty laundry in bad faith, which is not too surprising coming from him.

1. Commit 3ba50ec which Marcan is complaining about was pushed in 2008 and didn't just delete attrib specifically, but all (?) VCS comments indiscriminately. The file was barely touched since

2. "The authors of libogc didn't just steal proprietary Nintendo code (...) ignorance about the copyright implications of reverse engineering Nintendo binaries" ---> AFAIK it's software RE work, and nothing done in the console hacking scenes is truly cleanroom at all, and there's no point to it either as Nintendo can knock&talk and/or send strongly worded letters when they please, legality be damned

I don't know much about the Wii scene specifically, and libogc seems to be a mess in general, but what I do know is that libctru (3ds)/libnx (Switch) don't have that drama nor made the mistakes made in libogc