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.
We do not currently have a product limit option implemented in our payment tools, but there is a work around available which is based on the Inventory widget.
Please take a look at 'Implementing stock limit option b.' section of the following article.
There is also a quick screencast:
If you need this option for a non-payment form or some specific form format, please provide us with more information on your inquiry.