The test is easier than a full part-107 exam and I was able to finish mine in less than half an hour for free. The FAA did the right thing by making the test free to take. If there were any fees involved, it would hinder adoption and work against FAA’s goal. Some might see the test as another thing to do, but making it free really does have a lower barrier of entry, and is a necessary step in the right direction which could’ve easily gone wrong if a fee was involved.