My forms are now disabled

I received this email this morning. Is this valid?

"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:... "

Is my only option to continue using JotForm to pay for the account? Is there still an unpaid option?

Your upload space limit has been reached. You may delete submissions that contain uploaded files in order to free up space.

Let us know if you have more questions.