The Snapzu community as a whole has been around and growing for a few years now, so naturally a lot of popular topics and niches will already have an existing tribe. If you want to start a tribe that is similar to an already existing one on Snapzu, feel free to go right ahead and don't be discouraged as it's not uncommon for two or more similar tribes to co-exist and even join forces (by linking to each other) on the Snapzu platform. For example: /t/weather and /t/extremeweather  —  Many Snapzu members will subscribe to and participate in both, especially if the quality of posted content and discussions is high.