What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
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.
Free account can receive 100 submission every month. Once the submission limit is reached all your forms will be disabled and your users will not be able to submit your form.
On your question of #101 is bit tricky. Here is the process how it works. When you reach your submission limit, an warning email is sent to intimate you that your account has reached its limits and you should upgrade your account. You get some time to upgrade your account before your form gets disabled. In this grace period also you can receive submissions normally. Form actually gets disabled only once the grace period expires.
You also get an warning email when you are reaching close to your submission limits.
Hope this answers your question.