>>7301854That's because they're an action figure line making use of Glyos joints, not a building line. Matt originally did all this just to give indy toy makers a simple, versatile joint system to use, not everything has to go with onell stuff. I like Battle Tribes for being a line of small fantasy figures. I like mainline glyos for buildability.
Although I do think it's a shame BT never does a drop with color matched swing/axis joints.