Samurai Sudoku is one of the Sudoku sites built by the Reddit user 'dave333'.
The list of the Sudoku sites include:
reference: https://news.ycombinator.com/item?id=35573607
The only information about the founder is his Reddit username: 'dave333'. He created the first Sudoku site (https://samurai-sudoku.com/) in 2005. Transitioning from software engineering to self-employment as a web entrepreneur, he began building Sudoku sites as a hobby. Additionally, he explored house flipping before eventually retiring.
This portfolio of sites generates about $1000 per month through Google AdSense and donations.
The primary distribution channels for the sites are SEO. Take samurai-sudoku.com; it generated about 150k visits in December 2023.
And its top two channels are: