Conversation so far:
What happened in 1935?
In 1935 Holiday was signed to Brunswick Records by John Hammond to record current pop tunes with Teddy Wilson in the new swing style for the growing jukebox trade.
What happened in 1936?
Hammond spoke about the commercial impact of the Wilson-Holiday sides from 1935 to 1938, calling them a great asset to Brunswick.
What happened in 1937?
CANNOTANSWER.
What happened in 1938?
CANNOTANSWER.
What was recorded with Teddy Wilson?
Wilson, Holiday, Young, and other musicians came into the studio without musical arrangements and improvised as they performed.
Are there any other interesting aspects about this article?
Holiday was never given any royalties for her work, instead being paid a flat fee, which saved the company money.

Question: Why wasn't Holiday given any royalties?
Self-contained rewrite: Why wasn't Billie Holiday given any royalties for her work?