This sounds similar to a request that came up not long ago. My recommendation to you is the same: add a field to the form that will be used for crowdsourcing ideas. Make it feel like it’s related to the rest of the data being collected, even though you don’t really need it, and make sure it’s marked as required for the user to complete the form.
In Airtable, make a view that filters based on this field containing anything, but leave the field hidden. That view becomes your crowdsourced-ideas view.