I'm probably missing something but as I see it the weakest spot of TMDB is extremely low number of ratings. Except that, it's GREAT! I'm developing my first app based on this API and find it hard to understand how can it be. There are several apps based on this API for both iPhone and android. First, I think you should allow rating submission based on any identification parameter (email, Facebook, tweeter, etc.). So anytime one of the apps users rate a movie in their app it can be rated at the TMDB as well. Second, you should make it mandatory or at least give some advantage to those developers who contribute to TMDB. For example, you can limit the number of requests from 30requests/10sec and max 20 connections to 5requests/10sec and max of 3 connections. Then update the limits for those API keys that provide feedback (in terms of rating). The more feedback the API provide the better limit you should give.
I know it may sound to strict but I think you have to find a way to get much more votes and I think it shouldn't be too hard based on huge number of people using this API.
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