Building a Side Income Selling AI Developer Tools on Gumroad (Month 2 Update: $382)

Two months ago, I launched my first digital product on Gumroad – a credit optimization tool for Manus AI users. Here’s the transparent update with real numbers.

Month 2 Results

Metric Month 1 Month 2 Growth Revenue (gross) $152 $382 +151% Total sales 23 59 +157% Countries 14 22 +57% Conversion rate 11.2% 12.9% +15% Products 2 3 +50%

What’s Working

1. Bundle Strategy (54% of revenue)

The “Power Stack” bundle ($12) outsells individual products. People prefer getting both tools at a discount rather than buying separately.

2. Content Marketing via Dev.to

Publishing SEO-optimized articles drives consistent organic traffic. My top-performing articles:

• “Manus AI Review 2026” – 2,400+ views
• “How to Get More Credits” – 1,800+ views
• “5 Mistakes Wasting Credits” – 1,200+ views

3. Affiliate Program (30% commission)

Setting up a 30% affiliate commission attracted early promoters. Even small affiliates sending 2-3 sales/month add up.

4. Free Lead Magnet

The “Credit Optimizer Lite” free download captures emails and converts ~15% to paid within 30 days.

What’s NOT Working

• Newsletter outreach: Sent to 5 major AI newsletters, zero responses
• YouTuber outreach: Contacted 8 creators, zero responses
• Reddit organic: Posts get engagement but low direct conversions
• Twitter/X: Haven’t cracked the algorithm yet

Investments Made

Investment Cost ROI Web Tools Weekly newsletter ad $200 TBD (publishes June 11) TopAI.tools listing $47 Refunded (poor results) Domain (creditopt.ai) $12 Ongoing SEO value Total invested $259 $382 revenue = 47% net profit

Month 3 Goals

1. Hit $500 gross revenue
2. Get first affiliate sale
3. Measure Web Tools Weekly ROI (16K dev audience)
4. Launch on Product Hunt
5. Reach 100 total sales

Key Lessons

1. Bundle > Individual products – Always offer a bundle
2. Content compounds – Articles from month 1 still drive sales in month 2
3. Conversion rate matters more than traffic – 12.9% CVR means I need less traffic
4. Invest in distribution – The $200 newsletter ad is a bet on reaching the right audience

The Products

If you’re curious about what I’m selling:

• Credit Optimizer v5 – Saves 30-75% on AI credits ($12)
• Power Stack bundle – Includes Fast Navigation v3.0 ($12)

Use code LAUNCH30 for 30% off.

Building in public – ask me anything in the comments!

🏆 UPDATE: Credit Optimizer was just featured in Web Tools Weekly #673 (4,800+ devs)! Use code WTW20 for 20% off — Get it here. Expires Jun 13.