Simultaneous access problems and call limit to the DB

Hello Retool Team,
I am having some difficulty understanding the limitations of the Retool platform when creating applications for public use. We created an application and when we made it available for use by the community (about 70 people simultaneously), the server crashed. I have a bunissess subscription. In addition to the error displayed on the page, all application management is rendered invisible. Initially, we understood that it was a limit of 5,000 requests per minute to the DB. However, with 100 accesses with only 2 queries, the same situation occurs. Therefore, I would like to know how we can increase the number of requests and the number of simultaneous accesses.

Additional info: Retool Cloud