Sustainable customer growth under a strict CPA ceiling
Coffee-machine rental with a niche audience: a scalable campaign structure that grew the lead count while keeping CPA at half the target level.
Introduction
Koffein Service is a provider that rents out coffee machines. To scale their operation sustainably, they needed to win more customers, and for that they chose Markestic’s services.
Challenge
Because of its distinctive service, Koffein Service works with a niche audience that the poorly performing static creatives could not reach well enough. The result: low demand, stagnating conversions, and no growth in customer or sales numbers.
Cost efficiency was especially important, so they set a strict CPA level (the cost of acquiring a customer) that we had to stay below.
Solution
The first and most important step was producing new creative material. Alongside the static ads, which in themselves already gave a fresher look, we developed video content, since it performs noticeably better for conversion. The videos were not only more attention-grabbing, they also increased user interaction.
We tested the creatives in several rounds: we refined performance by A/B testing video and static ads, and introduced a new visual approach as well. We also launched a new conversion campaign with broad and lookalike targeting on Facebook, then used a remarketing campaign to target those who had already interacted with the brand but had not yet converted.
As part of the international expansion we also launched ads in Slovakia, placing particular emphasis on creatives built around the Delonghi brand. In the summer of 2025 TikTok also took on an important role: in July and August we posted two to three organic videos a week, alongside three active promoted videos a week.
Channels and tools
Results
By January–May 2025 spend had risen by 124.5%, while the number of leads grew by 56.3%. CPA rose by 39.8% compared with the same period in 2024, but even so it stayed below 50% of the originally set CPA level, making the campaigns sustainably scalable.
CPA on its own is not a sufficient metric: if lead volume stays low, staff capacity goes unused and no real business value is created. The 2025 structure therefore met both conditions at once, spend below the target CPA, and enough lead volume for the team’s capacity.
Summary
The creative shift (from static to video), the layered campaign structure and the international expansion together made acquisition scalable. The business result is not the improvement of a single metric, but the balance of the two: spend below the target CPA, with as many leads as it takes to keep the team’s capacity continuously filled.
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