Yo Paul!
Within the plugin, there’s not a way to disable JUST that portion of the signup form. What we do is look at the form that’s hosted over in your MailChimp account and bring over those settings.
However, with that said, there is a neat little trick that you can do to hide those settings in the plugin and have them displayed on your list (if you want to keep them there). What you’ll want to do is open up your MailChimp list and then go to “Settings” -> “list name and defaults” and from there, disable the option for email type preference.
Screenshot: https://cl.ly/2n1A021N3m1d3u2h0y2t
After that has been disabled and saved within your list, you’ll want to go back to your WordPress dashboard and go to “Settings” -> “MailChimp Setup” and then click on “Update List”. This will update the settings in your WordPress plugin and remove that option for HTML, text, or mobile options.
If you’d like to re-add the options to your form that’s hosted on MailChimp, you can go back to the list’s settings and re-enable that feature. Because the plugin doesn’t communicate automatically with your MailChimp list, those options won’t be added back to your WP setup until you click “update list” again.
It’s kind of a workaround and not nearly as complicated as I’ve made it seem. ??
If we can help with anything else, give us a shout!
Cheers