Surely you aren't assuming the abrupt move of 70K users from one board to another is going to map as linear growth over a week? I would predict that the 7.5K we have are the die-hards and we are going to see see slow and burty growth based on frequency of QPosts. This board also has about 10 hard barriers to entry (NSFW, the aboriginals here are unpleasant, the 10 points to post system, the lack of clarity around anon versus named use, and how points are accumulated, the UI looks like it was designed as a college summer project....etc. etc.) so a lot of the normie lurkers just wont work to use it.