Well that not true. Musing also upvote the questions and answers too.
I have also submitted few question and some the those got upvote.
However, Musing team is not upvoting each and every question or answer, they analyse these questions and answers according to their merit and upvote accordingly.
Decent and educational questions got good upvote whereas, repeated questions may not got an upvote. Following poits should be considered before asking the question.
Question should be relevant.
Avoid asking repeated question.
Question asked should be clear and properly described.