People lose interest, that's the most deciding factor. Sometimes it becomes a chore to write if people become less engaged, which is why I try to get people to contribute to the universe, and become invested, so that they really feel like they're part of something.

I want to emphasize that there is no 'post expectation' for this RP. 1 paragraph, 5, 10, idc. As long as you can convey what your character is doing and feeling, it's all good here.