It is not a game glitch, a cheat, or a hack. It is this
an exploit from a french language meaning "achievement" or "accomplishment" is a piece of software, a chunk of data, or sequence of commands that take advantage of a bug, glitch or vulnerability in order to cause unintended or unanticipated behavior to occur.

So for this game heres an example it would basically be a feature in the game "software if you wish to call it for those few of you" that people took advantage of because the feature was vulnerable and it caused unintended actions and there for nerfed or fixed. It happens everyday in every game.

Pretty solid to me.