Thanks a lot @somada141! Apologies for any confusion.
Let me clarify: the Free tier covers the first 250k API requests made in a single month. If the number of requests in a month goes beyond the threshold, the API will start returning Forbidden errors. The counter gets reset at the first of each month.
If your service gets more than 250k hits a month, then you will be a perfect match for our "Pro" tier.
This pricing structure, puts us on a league of our own, offering to the developers a huge package of free API calls every single month. Nobody else does it!