This isn't "Free" as it's only a usage-limited API service. The example I tried also didn't show it to be superior to existing open solutions. So I fail to see

This isn't "Free" as it's only a usage-limited API service. The example I tried also didn't show it to be superior to existing open solutions. So I fail to see it's interest (and wonder how it got so many upvotes in such a short time without any comment).