Results and Case Studies: the complete community guide
Marcos Rodrigues · 2026-10-07
Contents
1. from 22 € to 9 € CPA in nutra in italy
2. the metrics that matter
3. break-even CPA
4. weekly cash flow for a paid ads operation
5. payback and cash flow
6. attribution
7. 30-day journal of a product test
8. how to document a test that didn’t work
9. final checklist
1. from 22 € to 9 € CPA in nutra in italy
- Initial Situation: CPA of 22 € with an average return of 60 € per sale.
- Changes Made:
- Improved targeting: focus on audiences that generated higher engagement.
- A/B testing creatives: 5 variations that increased the click-through rate (CTR) from 1,5% to 3,2%.
- Adjusted ad schedules: more conversions during specific time slots.
- Final Result: CPA reduced to 9 €, with 3x more sales, increasing ROI.
2. the metrics that matter
- Break-Even CPA:
- Formula: Total Cost / Total Sales.
- Example: If the total cost is 1.000 € and sales are 100, break-even CPA = 10 €.
- Payback:
- Formula: Time needed to recover the investment.
- Example: An investment of 1.000 € with a profit of 250 €/month = payback in 4 months.
- LTV (Customer Lifetime Value):
- Important for understanding how much to spend on acquisition.
3. break-even CPA
- Common Mistake: Ignoring fixed and variable costs when calculating break-even CPA.
- Example:
- Variable cost (product) of 15 €, fixed cost (marketing) of 500 €.
- If the selling price is 50 €, break-even CPA needs to include all costs.
4. weekly cash flow for a paid ads operation
- 9-Column Spreadsheet:
- Date
- Ad spend
- Sales made
- Revenue generated
- Cost of products
- Gross profit
- Fixed expenses
- Net profit
- Cumulative balance
- Why It Matters: Lets you see the financial health of the operation and make quick decisions.
5. payback and cash flow
- Payback Calculation:
- If you invest 2.000 € and make a profit of 500 €/month, payback will be 4 months.
- Cash Needed to Scale:
- Set aside 3 months of operating expenses to avoid cash flow problems.
6. attribution
- Data Discrepancy:
- Meta reports 100 sales, but the internal system shows 70.
- What to Do:
- Check your pixel and conversion attribution setup.
- Run control tests to validate the data.
7. 30-day journal of a product test
- Structure:
- Day 1: Launch the ad.
- Day 7: First performance data, adjust targeting.
- Day 15: Test new creatives.
- Day 30: Analyze results and decide whether to keep going.
- Takeaway: Documenting each step helps you avoid repeating mistakes.
8. how to document a test that didn’t work
- Strategy:
- Create a document with:
- Product name
- Test date
- Results (sales, CPA)
- Reasons it failed.
- Why It Matters: Analyzing what didn’t work helps you avoid repeating mistakes.
9. final checklist
- Set clear goals for each campaign.
- Calculate break-even CPA before you start.
- Monitor cash flow weekly.
- Set a realistic payback period.
- Review conversion attribution periodically.
- Document product tests in detail.
- Review relevant weekly metrics.
- Have a plan for tests that failed.
- Make ongoing campaign adjustments.
- Use tools like FreeSpy for ad insights.
What was your average CPA on your last campaign, and how did you adjust your strategy based on the results?