New product stuck at 8–9 units/day. Conversion is solid (11%) but adding ad budget just kills ACOS without increasing orders. How do I break through to 30 units/day?

Your category conversion rate is 6% and you’re at 11%. That means your listing is stronger than average. You’re in a good spot.
The path to 30 units/day isn’t more of the same — it’s new traffic sources. You’ve already maxed out the small keywords.
Here’s what I’d try in order:

1. Expand to medium keywords (50k–150k ABA)
2. Test SBV (even basic video can work)
3. If you get a Best Deal invitation, take it — that’s often the fastest way to break a plateau
4. Consider a small off-Amazon push to get a few extra orders and boost ranking

You’re closer than you think. Just need to widen the funnel.

I’ve been in this exact spot. Solid conversion, good reviews, but stuck at single-digit daily sales.

What helped me break out:

• Doubled budget on my best converting campaigns (not just a little — like 2x)
• Let it run for 10 days without touching it
• Used the search term report to find new keywords that were already getting clicks
• Added those to a separate broad campaign

It took about 2–3 weeks, but eventually the volume picked up. Sometimes you just need to give it time and let the data accumulate.

Quick thought on your ad structure: you mentioned auto, broad, and exact. That’s fine, but you might be missing mid-funnel traffic.
Try adding:

• Phrase match campaigns for your best converting small keywords
• ASIN targeting on competitors with similar products but worse reviews or higher price
• Category targeting if your product fits a specific subcategory

Also, don’t be afraid to let ACOS run higher during launch. If you’re getting 11% conversion on small terms, you can probably afford to bid more aggressively to test bigger terms.

The coupon usage tells you something important: people are price-sensitive but they’re using the coupon. If the $39.99 pre-coupon price were scaring them off, they wouldn’t click.
Your real bottleneck is reach. You’re targeting small keywords and hitting their volume limit. The only way to get more units is to expand into terms with more search volume.
One approach: use your current converting small keywords as stems. Take the ones that work, and build out broad/phrase campaigns around them. That way you’re expanding into related terms while staying relevant.
Also, once your Vine reviews come in, you’ll get a conversion boost. That might be the push you need.

Looking at your data: 11% conversion, 8–9 units/day, ACOS around 30%. For a new product, that’s actually solid.
The issue is you’re capped by the traffic volume of the keywords you’re targeting. If you want to break out, you need to go after bigger terms — but not all at once.
Try this:

• Pick 5–10 medium-volume keywords (ABA 50k–150k) that are directly relevant
• Run them in a separate broad/phrase campaign with slightly higher bids
• Monitor for 1–2 weeks, pull out converting terms into exact
• Gradually shift budget from your small keywords to the ones that perform

Also, don’t expect instant results. Adding budget takes time for the algorithm to adjust. Give it at least 7–10 days before judging.