Sources / methodology
How we judge assumptions
This page explains what is checked, what is not assumed, and how calculators should be read.
Updated:
Source scope
Official documents, platform pages, and public policies are preferred.
Search volume, conversion rate, RPM, and success rate are not invented when they are not verified.
Method
Calculators show required scale from the values entered. They are not prediction tools.
Comparison pages show operational tradeoffs rather than a universal winner.