Ok, I have an important question about this system...

I`ve been hearing about this in different communities nowadays and decided to research the topic. The system looks pretty good and very effective in theory and in test so far. But;

How come this was created in 2015 and never really got any attention until the end of 2017? Seems like they even gave away free coins which ended in July 2017. But people still didn`t talk about it so much.

If the system is this good and solid then why this hasn`t become the next big thing for the last 2.5 years?