At first, we will send you a warning by email that your response volume is getting low - you can set this warning limit in your account settings after registering.
Please make sure your email address is always correct.
If your available Survey Response balance hits below zero your participants won't be able to answer your survey(s) anymore and we will send another email to you.
If you are using the FREE plan, then your access to LimeSurvey will be locked completely. In that case, you will have to wait until the end of your month period for it to get unlocked automatically or buy a subscription plan.