3. I have no idea how some people calculated time two months between solving #125 and #130

it was a year or so.
That is true, it was a more than a year
Puzzle 120 was redeem on February 27, 2023 (anyone can check it
here)
Puzzle 125 was redeem on July 9, 2023 (check it
here)
Puzzle 130 was redeem on September 23, 2024 (check it
here)
That was 1 year and two months with >100 GPU wow!!!
All of them were Nvidia 4090 ?
5. I want to share my experience in open source, step by step. But it won't be ready-to-use software so everyone can just run it and wait for money

Nice that is fair, any information about the changes on kangaroo is welcome.
Thanks for sharing your experience, btw i have three questions.
Why did you wait to much to announce it?
Did you receive external funding?
What is your ROI?