Looked into this issue elsewhere, but didn’t see any concrete answers. One user stated that there are 50 free requests on the free tier, but looking at the sign-up page does not state that anymore.
I have to think that 17 requests is unusably low for a Free Tier, but I’m now locked out of making requests after a paltry 17.
Semi-relatedly, the Dashboard is … interesting. If you switch between date ranges, you lose the full list of requests unless you manually refresh the page.