Looks like Materia Collective has retroactively changed their FAQ and is doubling down on their fangame stance. Gross. This is not at all what was stated by Toby Fox previously regarding usage in YouTube videos.

THE BEST PART ABOUT THIS IS HOW LITERALLY BELOW THIS, THEY ADMIT TO BEING FINE WITH IT??? oh yea normal remixes are fine, but if it appears in fangames??? NOPE CAN'T HAVE THAT

literal el*n m*sk move