I know that there's an official name for remixing and stealing credit, but I don't know what it is. ¯_(ツ)_/¯ But, I found a theft in Hopscotch. Evidence below.
As you can see here, Funky remixed a project from FIFA 15 ultimate team, and published it 2 hours before I screeenshotted this. But, we also see his trademark "Made by r Funky 63". I wanted to figure out what was going on, so I went to FIFA 15 ultimate team's profile and saw this