ActiveCampaign has a great pop up form builder, but it doesn't allow for custom fields. You can make an inline form with custom fields from within ActiveCampaign. You can take the HTML from that form and import it into OptIn Monster, and that will allow you to have a modal with custom fields in it.
That's what I'm looking for, a pop-up with custom fields. Both ActiveCampaign and OptIn Monster assure me that this should work, but neither I nor my designer has been able to get this to work.
Happy to pay an hourly rate for help with this. Emails to DanesFakeEmail@gmail.com (don't worry, it's really an email). I'm going to crosspost in Upwork as well.