Can API calls be more than 150 for free?

Hi, I’m working at a company in South Korea and I am using Groupdocs API.(convertter for converting from ppt to image)
But differently form what you said,(at the website it is told that we can call the API only 150 times per month for free) I tried calling the API 152 times and it still works.You should know that I didn’t purchase anything.
Is the information that I know wrong or is the API counting system not working?

The java maven I used is attached.
ClipboardImage_2023-04-18_174644.png (1.9 KB)

@Michelle_Seo

It seems like you read this from GroupDocs.Conversion Cloud API guide/documentation but you are actually implementing GroupDocs.Conversion back-end API in your application.
Take a look at the back-end API limitations.