That’s a fair question. I’m using @weavium GSheet, so that I can manage some of the content from Spreadsheets. It has been a massive challenge though, because it’s almost impossible to interact the insides of GSheet with the space around it. For example, pressing the “Add to Cart” button within the GSheet stack. I cannot find a way to generate a pop-up notification when one presses the add to cart button. A simple “Item Added” in the top left of the browser window would be ideal.
So the only way I’ve been able to have a trigger from within Gsheet interact outside of that stack, is by opening an iframe with some content.
I should say though, I’ve come up against this a few times… where I do not want any of the iframe content on my main site to render when the user loads the page. If there was a way to disable that for iframes, I would be so, so, very happy 
For example, this user - Vimeo is slowing down my page loading
And also, I see solutions beyond my pay grade (and outside of rapidweaver)
I would spend my life savings for a stack that could do this!!
(and my life savings amounts to a few hundred dollars :)))
-Al