Signing up for a free trial requires some bit of commitment. A couple of sentences isn't enough for most people to commit to a new product.

If you think about the customer journey as Research-Evaluate-Purchase, the 30 day free trial is the Evaluate stage. There isn't enough information (or any specifics) on the landing page to do any meaningful amount of research.

There is negative value in signing up for free trials for things I don't understand on the extreme off-chance I might find them useful.

It's still API data that may be sensitive.