This strategy has its losses too. The Marvels (-$237m), Indiana Jones and the Dial of Destiny (-$143m), and Haunted Mansion (-$117m) all lost them money last year.
The new film would not be a sequel or a remake, but a “continuation,” with presumably new characters trying to escape from the walled complex known as the Glade.
If its based on the Maze Runner world but not actually a story from one of the books they probably pay the author a bit less too.
If there is someone out there still consuming this media in a way that generates revenue for the studio giving them reason to believe there is a market for even more Maze Runner content, they should be charged with crimes against humanity.