They don't make any money. They are, essentially, only useful learning experiences in what not to do.
from the artist's perspective, it is quite bad money wise (https://www.rocksoffmag.com/the-impact-of-music-streaming-on...).
from a consumer's perspective however, music streaming enjoys the relative lack of "exclusive" content that other media suffers from. so i personally have no issues with its current state.
They don't make any money. They are, essentially, only useful learning experiences in what not to do.