I was curious how the Atlas Shrugged (AS) did overall and which of the movies did better than the others, so I used Box Office Mojo (BOM) statistics to analyze them. Note that all of the following assumes that BOM statistics are accurate.
Movie Gross Theaters* Lifespan
ASP1 $4,627,375 465 35 days / 5 weeks
ASP2 $3,336,053 1,012 49 days / 7 weeks
ASP3 $846,704 242 21 days / 3 weeks
*Largest number of theaters during release
The main thing I took from the above is that the ASP3 was in far fewer theaters than either of the other two and that it fared far worse than the other two. I don't know if there is a correlation or not.
If you are interested in digging even more deeply into the weekly or daily statistics, please go to www.boxofficemojo.com and type in "atlas shrugged" into the search box. This will bring up all three movies and you can navigate around to view the details.