What will happen when Starter/Free plan reaches limit or quota?

Also, We will probably have about 175 people registering for class -- since we have the 'free' program at this time, what will happen?  Will the program just not accept any more or will it delete previous submissions?

Hi,

For free plan, you are allowed to receive 100 regular submissions, 10 SSL secure submissions and 10 payments received per month. Please check the details of each subscription plan here: http://www.jotform.com/pricing.

When you are near your quota or limit, you will receive a notification about it, when you are over your quota or limit all your forms will be disabled, which means no new submissions will be received because the forms are not accessible.

To continue using it you will need to upgrade to a higher subscription plan, but if you would not like to upgrade you can wait for the form limits to reset back to zero, this happens every 1st day of the next month.

I hope this helps.

Kind regards