So I hit a combined total of 100 submissions across all forms? Will they disappear from the site or just not be delivered?

Hi,

If you go over your limits, you will have a day or two to upgrade in order to restore your forms.  Your submission data will be unaffected, however, your forms will no longer accept new submissions.  The users filling out the forms will receive a "form over quota" error message. 

There are several "Get More" tasks you can do in your account settings that will permanently increase your limits:

https://www.jotform.com/myaccount/getMore

You should be able to get enough extra to put you back below your threshold. 

Yes! So I added like 40 monthly form submissions by completing some of the tasks and my account is still disabled??? What's going on please?

Dear camjag26, 

You have currently reached the limits of your account. Your forms are disabled now. 

Upgrade your account today to continue using JotForm; receive submissions, collect payments from your users and have more upload space. Upgrading is quick and easy:
http://www.jotform.com/upgrade?username=camjag26

Thanks for using JotForm, 

JotForm Team
http://www.jotform.com/

You currently have have used 294/155 submissions for the month.  Even with the extra 40 added by the Get More tasks, you are still nearly double your limits.  You would either need to upgrade to Bronze or wait until the monthly reset on the 1st of November in order to restore your forms.