It is not "highly ethical", this game has existed for decades. That's like saying Candy Crush copied Bejeweled; neither games were origina.
After explicitly mentioning in a comment that the game was derived from Wordle - "I came across https://bert.org/2021/11/24/the-best-starting-word-in-wordle... on HN the other day".
The OP now added "About", with weasel-worded reference to Wordle. Jesus. How hard is it to just acknowledge other people's work that you are directly borrowing from.
It’s not like he’s getting rich off three dollars a month. He’s providing a free service.
Does Wordle have a link to their inspiration?
I support people being creative, if he wants to earn a few bucks and disrupt the word game market with a new business model, fine by me.