No. Only after the paid subscription period has ended will your subscription revert back to the FREE package, which will set your account to 25 responses.
If you cancel your subscription, you will continue to have access to all features of your plan for the time period you have already paid for. (This is the same for LimeSurvey ComfortUpdate and LimeSurvey Cloud). If you are using LimeSurvey Cloud and ...
Your subscription month (or year, depending on your subscription) starts on the day you subscribe. Example: A LimeSurvey Cloud BASIC package purchased on April, 23rd will be automatically renewed on the 23rd of May.
Yes. Your subscription will revert back to the FREE plan after the paid period is over (assuming that you cancelled it). Please note that some features (such as domain aliasing) are only available with a paid subscription.
Yes. At the end of each subscription period your response quota is reset. For example, the response quota of the BASIC package will be reset to 1000 at the end of the month.