Maropost Forms are not mobile-friendly, which greatly minimize the value of the feature as a whole, given the widespread use of mobile devices on the internet.
Please update the HTML output by the forms engine to responsive HTML.
Thank you for your response. I am looking forward to the improvement.
We are actually going to be upgrading Forms with a drag-and-drop editor very similar to that of Landing Pages.
As a matter of fact, you can present create a Landing Page with that references a Maropost sign-up form. This process will enable you to create a nice landing page that has responsive-design encoding built in that also includes a Maropost signup form. I believe that your Client Success Director already showed you how. If I am mistaken, please reach out to him and he'll show you how easy it is to do so.
Vice President - Product and Client Success
Maropost Marketing Cloud