I wrote a newsletter for about eight months before I understood why some of them got replies and most of them didn’t. The ones that got replies all had something in common. They started with a question I hadn’t answered yet. Not a teaser. Not a dramatic cliffhanger. Just an honest unresolved thing sitting at the top of the page, pulling the reader forward.
The ones that didn’t get replies usually started the same way: here is a topic, here are some thoughts. Complete. Closed. No thread to follow. Technically fine. Completely forgettable.
Why Unresolved Questions Drive Behavior
There’s a thing your brain does automatically. When you encounter a question that hasn’t been answered, you don’t close it and move on. You carry it. The unresolved state persists until the answer arrives, and most people don’t actively decide to abandon an open question. They just carry it around until resolution shows up or they run out of capacity.
This is the open loop. It’s not a manipulation technique. It’s a description of how attention actually works. The brain has a drive toward closure strong enough to override other demands on focus. A well-placed open loop at the start of any piece of content, any email, any article, any conversation, keeps the reader present because the need for resolution is doing the work that you would otherwise have to do through sheer quality of argument.
At Grinder Gym, I started paying attention to member communication through this lens. Messages that started with a closed frame, “Here’s what’s happening this month”, got skimmed. Messages that started with an open frame, “We ran into a problem last week we didn’t expect”, got read. Same information. Same writer. The opening determined whether they made it to the end.
What an Open Loop Actually Looks Like
An open loop is not a cliffhanger. It doesn’t require suspense or dramatic stakes. It requires only an unresolved question, something the reader wants answered more than they want to stop reading.
Two years ago, member retention at Grinder Gym was leaking in a place I couldn’t see. Month three. People who made it through the first two months, past the hard adjustment, past the initial soreness, were still walking out the door at a rate I couldn’t explain through the obvious variables. The fix wasn’t what I thought it would be. That sentence is an open loop. If retention is something you care about, you cannot leave it there.
Compare it to: “Membership retention is a challenge for many gym operators. In this article we will cover several strategies.” No tension. No reason to keep reading that you weren’t already bringing with you.
The difference between those two openings is not writing quality. It’s structural. One creates a gap. The other fills a gap that didn’t exist. The brain only drives toward closure when a loop has actually been opened.
The Mechanism: Why It Works, Not Just That It Works
Here’s why this matters beyond copywriting tips: the open loop is a trust structure, not just an attention structure. When you open a loop honestly, based on something real, something you actually experienced, and then close it with genuine information, you’re demonstrating that you have something worth waiting for. You’re proving it before they have to believe it.
The operators who produce content people actually read to the end haven’t found better topics. They’ve built the habit of starting every piece with a question their reader cannot walk away from. The resolution delivers on the promise of the question. That’s the whole mechanism. Do it repeatedly and the reader learns that your loops are always worth following. That’s when you stop fighting for attention and start earning it in advance.
Applying This to Your Operation
- Write your first paragraph last. Once you know what the piece contains, write the opening as a loop that can only be closed by reading forward. The first sentence should create a question. The rest answers it.
- Your subject lines should pull, not announce. “The retention problem we almost missed” pulls. “Five tips for better retention” announces. One creates a gap. The other fills a gap nobody opened.
- Build multi-part sequences with intentional handoffs. End part one with something that can only be answered in part two. The reader who finishes part one and doesn’t open part two is gone, give them a reason to come back.
- The loop only works if the resolution is real. Don’t open something you can’t close well. A weak resolution teaches the reader that your questions aren’t worth following.