Ad and offer fatigue are real things. We work with agents, and REI's currently. We use hook for REI like "Get an Instant Cash Offer On Your Home". With that said, we have spent over $20 million dollars in the vertical, and as you would assume, not with a single ad/offer. We typically have multiple running at once. Every single month we create new ads iterating on working hooks and test test test. And its not always just the ads, it could be the landing page, it could be the form, etc. Back in the day when we ran ads for clients with webinar funnels, most WEBINARS burn out after a million dollars of spend and we would have to have the clients rerecord/rewrite their entire webinars and we would get an instant lift. Lesson is, as you scale ad spend, you have to scale your split testing on every single step of your funnel.