I believe the developer was interviewed and said he/she has no plans to change the game to make money. If you go to just https://www.powerlanguage.co.uk/ (maker of the game) you can see he made other games on Reddit (The Button and Place) and is listed as an artist, product manager, and engineer. I suspect the attention the game has received has resulted in many head hunters reaching out.
Think of Wordle as a loss leader for his career.