Nobody is forced to subscribe to help the website. You must just wait a week to play part 2.
If the 2 parts are published at the same time, certain player begins part 2 without to have finished part 1 and the story has no sense anymore . I think that it is not respectful for those who worked on the scenario. It is for this reason that there is a code at the end of some game.
For this game I chose another way, that all.