The homepage demo renders a page with no signup and no key. Until now it finished by showing the image, its size and the render time, and said nothing about what to do next.
A capture now also shows the request that produced it:
curl -o shot.png "https://api.screenshotline.com/take?url=...&block_ads=true" -H "X-Access-Key: YOUR_KEY"
with whatever options you ticked already filled in, and a link to create a free key. 500 renders a month, no card.
Nothing else changed about the demo: still no signup, still 5 renders a minute per IP, still queued behind paying customers.