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.
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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.
That would be SSL submissions, which for free acccounts are allowed up to 10 per month.
Please review your privileges with the free account on this page
I checked the page on your website where the form is, and you have not used the secure method to embed the form - so you are not using up SSL submissions through that form.
So, for now, you should be Ok.
If the issue persists - please let us know.