Explain, please, for Two-Stage Rate Limiting in Nginx?

Question

Nginx

I want to set up Two-Stage Rate Limiting.
In the Nginx docs , in the appropriate section, it says that:

The first 8 requests (the value of delay) are proxied by NGINX Plus without delay. The next 4 requests (burst - delay) are delayed so that the defined rate of 5 r/s is not exceeded. The next 3 requests are rejected because the total burst size has been exceeded. Subsequent requests are delayed .

I would like to clarify the behavior of requests after three requests have been rejected.
The doc says: " Subsequent requests are delayed ." and not a word about the behavior of this delay.

Answer 1

Relevant article: https://habr.com/ru/company/southbridge/blog/329876/