Review Detail of ShaneKenra in My Vampire System

I started reading this around 8ish at night and I ended up 65 chapters in and before I realised it was 5 in the morning, you are doing a great job dude, but question, why are the first 65 chapters free and the it starts to ask for coins, is it to get you hooked, so you will want to pay for something you are enjoying or a sly way of the system to get money by going "Hey sorry but if you wanna keep going we are gonna need you to pay up or no more book for you???"