Are there any updates on this issue? If I just want the "submit" button to be activated when a condition is reached, such as when people check a box on a particular field. Thanks.
OK, demo here: MktoForms2 :: Conditionally Show Submit - JSFiddle
In the demo, when the dropdown is empty, there is no Submit button. When the dropdown is set to 'Client', a block of rich text is shown, but still no Submit button. Any other option from the dropdown will show the Submit button.
The code is fairly primitive: when the form is ready, I relocate the button into a rich text area that is managed via visibility rules. From that point onward, VRs determine what happens.
Screenshots to tell the rest of the story: