Opinion Stage offers a free limited plan. The free plan is limited in features & usage (up to 25 responses/month). For full details of the free plan, view the pricing page
If you exceed the free plan view limit ( >25 responses) for the month your items will be disabled until the next month or until you upgrade to a paid plan.
How do I know how many views my items had this month?
To see the number of responses this month, go to the usage stats screen