Rebike saves 20% CPC by working with CSS Partner, powered by UnitedAds

The starting point: expensive clicks, little room to move

Before talking solutions, it helps to look at the conditions almost every shop with high-ticket products faces.

• High basket value, limited margin: with refurbished hardware, the work sits in inspection, spare parts and warranty. The price is high; the percentage margin is not.
• Long decision paths: buyers click repeatedly, comparing models, model years and condition grades. Many clicks belong to the same purchase decision.
• Seasonality: in spring, demand and click prices rise together. That is exactly when budget is worth the most.
• Fierce competition for the same SKUs: a popular model is listed by many retailers. The auction decides who gets seen.

What actually happens when CPCs climb

When click prices rise, the same pattern shows up in the account: the daily budget runs out earlier, impression share drops, and expensive models get throttled in favour of cheaper categories. The account looks "optimised" but loses reach exactly where the revenue sits.

The usual responses – lower bids, more negatives, a cleaner feed – all help. None of them changes the fact that every click is still bought too expensively.

Why a CSS works at this point

Shopping ads always run through a Comparison Shopping Service. Serving directly via Google Shopping means using Google's own CSS – and its bid includes a margin Google keeps. Run the same ad through a certified third-party CSS and that share disappears.

In numbers, there are two ways to read the same effect:

One important qualifier: this 20% is not a campaign result or a forecast. It is a structural advantage of the auction mechanics. It applies from the first click after migration, regardless of how well the account is otherwise set up.

The switch: what Rebike did – and what it didn't

The worry before any CSS switch is always the same: pausing campaigns, losing learning phases, wrecking history. None of that happens. The process is short and takes place almost entirely on our side.

1. 1Merchant Center access: the shop invites us as a user in Google Merchant Center. That is all the retailer has to do.
2. 2A quick check: we review the feed, target countries and account structure so nothing gets stuck during the move.
3. 3Move to our CSS: we attach the Merchant Center to our certified CSS. Campaigns keep running, products stay live.
4. 4Verification: we check product status and serving so no category quietly drops out.
5. 5The advantage kicks in: the next auction already runs from the better position.

What explicitly stays the same

• Shop, platform and product data: no changes, no script, nothing to touch in the front end.
• Feed and feed tool: stay exactly as they are.
• Campaign structure, bidding strategies and budgets: remain with the shop or its agency.
• Tracking, conversion data and history: carry on without a reset.
• Domain and landing pages: clicks still go straight to the shop.

If you want the individual steps in detail, our guide on switching your CSS provider step by step walks through them. For Rebike, the practical effort was one Merchant Center invite and a short kick-off call.

What shows up in the account afterwards

A CSS does not make weak campaigns good. It shifts unit costs – and that shows up in different places than a campaign optimisation would.

• Click price: falls with identical bidding logic, because the markup is gone.
• Clicks per budget: rise accordingly, without anyone touching a campaign.
• Impression share: grows where budget was the bottleneck – typically on the most expensive, highest-revenue models.
• Contribution margin: improves whenever the saving is not reinvested.
• Seasonal peaks: stay biddable for longer because the budget lasts.

What a CSS does not do

It does not fix disapproved products, wrong feed prices or a broken campaign structure. If you start with a pile of Merchant Center errors, clear those first – then the CSS advantage applies to a clean account instead of half-visible products.

Applied to your shop: the maths in two minutes

You need exactly one number: your monthly Google Shopping budget. The rest is arithmetic.

• Step 1: take your monthly Shopping budget, say €5,000.
• Step 2: 20% of it is the structural saving – €1,000 per month here.
• Step 3: subtract the CSS fee: £17 per month.
• Step 4: what is left is either extra margin or extra click volume – your call.
• Break-even: the switch pays for itself at low three-figure monthly budgets. Above that, the gap widens fast.

With a range like Rebike's – high click prices, seasonal peaks, many comparison clicks per sale – that is not a rounding error but a predictable line in the annual plan. If you want the full picture of how our CSS works, the overview page lays out every detail.

Checklist: five steps to do the same

1. 1Check the channel split: how much of your Google Ads budget runs through Shopping? For most shops, more than they think.
2. 2Clean up Merchant Center: fix disapprovals, price and availability errors first so the advantage applies to your full range.
3. 3Calculate the saving: 20% of the Shopping budget minus the CSS fee – in writing, before you decide.
4. 4Pick a goal: protect margin or buy reach. Both are valid, but decide up front or the effect gets lost between campaigns.
5. 5Switch and measure: after migration, compare CPC, clicks and impression share with the previous month – same campaigns, different unit costs.

Takeaway

Rebike did not deploy a silver bullet. It changed a condition: Shopping ads now run through our certified Google CSS instead of Google's own. The result is a structural 20% advantage on click prices – with identical campaigns, an identical feed and identical control.

For shops with high-ticket products, this is probably the least spectacular and most reliable move in a Google Shopping setup: switch once, buy clicks cheaper for good.

• The advantage is mechanics, not a forecast – it applies from the first click.
• The effort is one Merchant Center invitation.
• Campaign control, feed and tracking stay untouched.
• The impact scales with budget and across every market.

Frequently asked questions