Thanks for the examples!
Unfortunately, they all use JavaScript to load and display the forms. Custom JavaScript is not allowed in AMP.
You could try wrapping the JavaScript in an <iframe>
, and see how that works. If it does work, you could certainly try writing a custom sanitizer that does this automatically for you.
However, be aware that with an iframe you would face some restrictions for the way you could interact with the form programmatically.
Ideally of course, Marketo would provide a solution that does not require iframes or custom JavaScript.
Looking at https://nation.marketo.com/, many people have asked about AMP compatibility there as well in the past. I recommend making your voice heard there too.
Hope that helps ??