Has anyone implemented the framework in the "Traction" book?

I'm referring to the book "Traction" by Gabriel Weinberg and Justin Mares.

Here's the book (not affiliate): https://www.amazon.com/Traction-Startup-Achieve-Explosive-Customer/dp/0241242533/
Here's a fantastic summary: https://sipreads.com/traction

Has anyone implemented the advice in it? Such as the 50/50 rule, the bullseye method etc. If so, which parts? To which extent? Have you had success with it?

Thanks,