The lint is free and always will be. You pay when a model reads the code.
Unlimited lint runs in the CLI and the GitHub Action, 64 mechanical rules compiled into the binary, unlimited rejection diagnosis, and every framework. Nothing leaves your machine and no account is needed.
Everything above, plus 25 interpretive audits a month against 386 rules that read your code, privacy form answers, and 3 seats.
75 interpretive audits a month, a higher ceiling for one run so a large codebase fits, and 10 seats.
The next audit is refused with a message saying which limit stopped it and when it resets. Nothing is charged that you did not agree to, and no audit runs part way.