Someone has recreantly been spamming ads for stories. And there is no option to reports those stories.
Here are a few examples.
https://www.mycast.io/stories/mdma-42542-10-9-delivery-guaranteed
https://www.mycast.io/stories/eutylone-802855-66-9-safe-transportation
https://www.mycast.io/stories/metonitazene-14680-51-4-high-quality
https://www.mycast.io/stories/adbb-abundant-precursors
And those are just the most recent ones.