Klepar
That is how the world work. Popular novels make more money than unpopular novels.
Spotify works the same way. Spotify pays about $0.005 per stream.
A popular artist with 100 million monthly stream will get $500,000 and an unknown/not mainstream artist with 1 million monthly stream will get only $5000.
If that less popular artist wants to make more money on Spotify, then he/she needs to make songs that more people listen to.
It's fair for every authors since the pie is divided equally based on the number of chapters read. Let's assume that each chapter read, QI will paid the author $0.005.
A popular author with 2 million chapters read in that month will be paid: 2 million x $0.005 = $10,000.
An unpopular author with only 100,000 chapters read in that month will be paid: 100,000 x $0.005 = $500.
Each chapter that you read from that unpopular author, the author will get paid. How much that authors will get paid depend on how many people read his/her novel and how many chapters are read in a given month.
There is also the DONATION option where you can donate and support these unpopular author.