How are people ensuring they're not burning either clay credits (or API credits) when running an email waterfall? I'm using LeadMagic, Prospeo and Wiza via API to find emails, and then LeadMagic to verify the email. What I've noticed is Leadmagics find an email and then states it's invalid (catch all) but then Prospeo is finding the same email and I'm being charged for it despite Leadmagic already confirming it's invalid. I know you can setup a 'only run if' but I'm unsure how you'd set it so that it doesn't deliver the same email