MWA and GDPR
PageDyno, Genius Lander, Easy Lead Magnets, Conversion Gorilla, etc are actually only conduits for any subscriber information - i.e. they collect the information as per the API/form code from the autoresponder service and pass this information right on.
We are monitoring the APIs/Form Codes for a webhook to handle the consent "tick box". If the autoresponder service doesn't provide the webhook, we would be enabling you to break GDPR law if we have a consent box that needs to be checked in the form but then doesn't actually send that data anywhere (ie to your autoresponder service) because it would be classed as collecting data that isn't relevant. So check boxes aren't a legal requirement, they're optional and only if the connected autoresponder service can receive that data via it's API
Since few autoresponders provide the webhook, you can say something like "Clicking the button confirms....." whatever text you would have put for the chcekbox