The option of using Embeds is a favorite option of Alloy. I use one on most of my webpages. So till now it worked fine.
But at the moment I cannot drag and drop the embed-stack into RW.
I tried different browsers, but alas.
The mouse/cursor isnot able to pick up the stack.
Maybe something isnot right in the url or …???
I found the source: I have used a lock on the page, to prevent drag and dropping : )