Look, a marketing offer email should be simple and focused: "Here's a thing. Here's an offer. Go do the thing."
Since I'm in performing arts it's more "Hey, you should see this new production. It's good. Here's a discount code."
Nobody's going to scroll down to even LOOK at the photos.
If this were part of the general email about the production, that would be one thing, but this is just a targeted offer. Keep. It. Simple.