Who else has he taken from?
Me.
Jayce made a gamemode similar to
SCP Secret Laboratory called CSD (Containment Station Delta), and he made some
CSDs (essentially joke SCPs) with anomalous effects. I contributed my own CSD idea, and he put it in the build as something you can interact with. My CSD is a casette tape of
Red Roses Too, which just makes everything around it turn red when its played on a cassette player.
Soon after Jayce starts hosting CSD- Gautier replicates it, makes his own gamemode called ACD. In Gautier's ACD, he puts an exact clone of my CSD that works the exact same way.
Gautier essentially stole my CSD, an original idea that i came up with (its anomalous properties).
He did not ask me for permission for putting it his ACD gamemode. Gautier, when I approached him about it, said that one of the people (AlexK) who helped build his ACD added it in by themselves, not Gautier himself. I have my doubts.
Another small thing I've made that he has started to copy is my Soundfont Replacements, which is where I just take MIDIs and replace the instruments in them and add some filters. I'm not going to lie, Soundfont Replacements are extremely easy to do and anyone can do it. What bothers me is the fact that Gautier doing it soon after I started making them. He even asked me to send the soundfonts that I use, and I did actually send a couple over to him, thinking nothing was gonna come from it.
He's even done a soundfont replacement of a midi that Jayce made (which was just a midi version of Dookie Dookie Panic), but called it his own track called
"A New Beginning". He's changed the name back though since somebody commented "where is this midi from?".