I have to agree with Terminalmancer. It's completely dead (and often just redirects to the home page). As one of the new Pathfinder hopefuls coming in from the HB, I'm rather discouraged and reminded of ComiXology's major push (http://www.ign.com/articles/2013/03/10/get-700-free-comics-from-marvel)
Putting aside the system's overcomplexity (why does everything redirect to the homepage when failing?) it seems clear we're all stuck. The Humble Bundle will be going for 2 more weeks, and every new addition is going to be struggling with the same issues. We're all going to be clogged. Then, assuming people keep trying and come back later, it's just going to perpetuate the problem.
We're in this for weeks.
Resolving this will need more than just a general request for patience. Either the system will need to be vastly optimized, the complexity reduced, or more power added (assuming the system is horizontally scalable).