The bug caused it to permanently reveal units on the minimap. As in youd be able to see units in your map long after they had left the "bright ray paths". It was completely broken
Yes, that's what I meant by 'minimap icon exploit'. I have seen it in action and stopped building the thing after becoming aware this was a problem.
But I speak for its intended purpose and how it was used in the past, not ruined by a bug they could never fix. Or at least I wasn't aware of the bug being around in 2015 anyway *Shrugs*