I guess they mean with "fork" a rebranded or self-compiled version. So unmodified source code, but different logo or name. Or compiled with different settings o

I guess they mean with "fork" a rebranded or self-compiled version. So unmodified source code, but different logo or name. Or compiled with different settings or for an unsupported platform. Something along that line. But calling this fork, after they are already forbidding modifications in point 1 is really strange phrasing.