@lesley it seems to me, that this module is just a solid basement. If I don't miss something, this module is less than 1000 lines of code. I am seriously considering to use mautic for my site, because I was planning to develop an inbound marketing module. But mautic seems to be so powerful and it's open source... If I am going to use it, my module will hopefully be more powerful than kuzmanys.
But before you get too euphoric: If I release such a module. It probably won't be free.