IF anyone thinks Mozart aged five, in the year 1724 was composing for purely commercial purposes, then they are truly pathetic , noone needs to have a conversation with Mozart to understand that.
Mozart's first composition was Andante in C, which he wrote at age four or five, Mozart's earliest composition attempts begin with piano sonatas and other piano pieces, as this is the instrument on which his musical education took place. Almost everything that he wrote for piano was intended to be played by himself (or by his sister, also a proficient piano player)
SO NO SUGGESTION HERE.ED.T. that these were composed for commercial purposes is there?