Last year sometime, I was creating a map with a tool that allows users to add their own services to the map (created with Esri’s js api). I was testing with Esri’s demo layers and I was not disappointed.
The funny images came from this sample layer: Layer URL: https://sampleserver6.arcgisonline.com/arcgis/rest/services/Wildfire/FeatureServer/1
But, unfortunately, it looks like Esri has wiped the layer. I just thought that this should be saved for posterity!
Your app looks pretty sweet -- I've been struggling with finding a nice way to accomplish what you said your app does (allow users to add their own services).
Could you possibly share the app / code or point me to the github repo?