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.
You can check each of the plans submission limit in this page: http://www.jotform.com/pricing.
For "Silver" plan, you will be allowed to have 10,000 "payments received" per month. To upgrade to a higher plan you can follow this guide: http://www.jotform.com/help/331-How-to-upgrade-my-account.
I hope that helps.