The €25 Million turnover number is misleading. Later, the article notes, "AdCash gives about 70% - 90% of revenue to their publishers, so with a turnover of €25 million, you can do the math on their theoretical profitability."

Let's say they keep 20% (the middle of that range). That's €5 Million. Of course, that's not profitability. That's essentially their revenue before the expense of having 40 employees, etc.

Still impressive but more realistic with that aspect clarified.