Now i am assuming that you want to maximise adding value to the platform and the same time looking for some nice rewards in that case i would suggest sticking  to asking questions that are long tail and rank organically on google , while if you are answering the questions try to bring a unique point ,  a point that genuinely describes your thought at the same time try to back it with some resources or fool proof points if possible.

though my assumptions might be wrong , but i think this platform can really kick of when people start adding value by asking genuine questions and try to be fair while answering. 

*i dont really like to write this but please avoid plag.