Study.com 5 Exam Limit per Month Clarification

[Jaymes]

I did some lurking on posts from 2023 where some members reported that Study.com allows you to take 5 exams per billing cycle. However, after speaking with Study.com customer support, I was informed that you may only "take up 5 exams per month". However, they didn't emphasize if it is a calendar month, or a rolling monthly period based on when you took the first test of the five. 

Does anyone have recent experience with this so I can get some clarity?

Is it:

5 exams per calendar month
5 exams per 30-day rolling period
5 exams per billing cycle