"These utility scripts aim to make the life easier for nvidia cards users. It started with a revelation that bumblebee in current state offers very poor performance. This solution offers a bit more complicated procedure but offers a full GPU utilization(in terms of linux drivers)"
Is it open source? Yes, GNU General Public License v2.0
Anyone that uses an optimus laptop that wants to eek out the best performance when using their nvidia gpu without having to switch drivers and restart finds this utility a necessity.