JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
No, the form submissions don't get deleted, but your forms are disabled once you reach your monthly limit.
So you won't be able to get new submissions once you go overboard until it resets the following month or until you upgrade before that.
You can, however, freely upgrade or downgrade at will at any time.
Please let us know if you have any more questions and we'll be happy to help.