Opt-In on Lead Capture Form
* Checkbox for Opt-In
* HTML to use for the prompt which can have URLs for the Terms of Service and Privacy Shield
* These options are just like the field level choices you already offer
GDPR will require that the explicit gesture be recorded (clicking on the Submit button), and the date and time of the opt-in. If those could go automatically with the lead into Base then it would be SO much easier for Base users to comply with the GDPR.
The workaround is to use a Zap (e.g. with WuFoo) to do it, but if it were off-the-shelf in Base that would be better.