There are two other forums that I frequent, titsintops and cinemajuggs. I've been a member of the later MUCH longer using it since 2006 vs joining titsintops just last year (although it seems like it's been longer). There is something unique about tits (titsintops) that I found and still find very attractive vs Cinemajuggs but at the moment I can't put my finger on it. I do think it has something to do with the greater attention to natural breasts but maybe that will be a future post.
The goal of The Macro Mastofact is to distill all of the large breast content I (and the future users here) consume into a product that more closely resembles what I consider the ideal large breasted woman. In doing so, that eliminated A LOT of what is found other places, including my two favorite aforementioned forums.