Explore · The library

Every resource founders actually use, in one library.

The essays, videos, podcasts, books and tools behind every answer across eChai's hubs, from starting up to go-to-market, D2C, founder money and AI, each with a note on why it is here.

What founders use most, ranked by how many answers lean on it.

  1. Loomer is one of the most cited independent Meta ads practitioners, and this piece turns the abstract 50 events rule into... Jon Loomer Digital Article · D2C Facebook Ads and the Learning Phase Jon Loomer
  2. Shopify updates this cost breakdown against live data on a rolling basis, so the CPC and CPM benchmarks and the learning phase... Shopify Article · D2C What Facebook Ads Cost in November 2025 Shopify
  3. Brings in a practitioner's rule (start with roughly $1,000 for low ticket products, more for high ticket) rather than a flat... HubSpot Article · D2C How to Plan Your Facebook Ads Budget (And Make The Biggest Impact) HubSpot
  4. A long running, frequently updated benchmark piece with cost per click broken out by industry, so you can sanity check whether... WordStream Article · D2C How Much Do Facebook Ads Cost? (+9 Ways to Stretch Your Budget) WordStream
  5. Real bootstrapped founders comparing notes on their actual starting numbers, a useful gut check against the agency scale advice... Indie Hackers Thread · D2C How much should I be spending on ads? Indie Hackers
  6. Sharma advises dozens of DTC brands and states plainly that you need a testing fund you're prepared to lose before you touch... Sharma Brands Newsletter · D2C 7 Things to do After Launching Your Brand Nik Sharma
  7. Straight from Meta: explains exactly how Advantage+ detailed targeting expands past your chosen interests, and where it does... Meta Business Help Center Article · D2C About Advantage+ Detailed Targeting Meta
  8. Documents Meta's own mid-2025 move to fold many interest categories into broader groupings, the exact policy shift pushing... Meta Business Help Center Article · D2C Updates to Detailed Targeting Meta
  9. Jon Loomer actually ran the A/B test rather than repeating platform talking points, so this is one of the few sources with... Jon Loomer Digital Article · D2C Test Results: Advantage+ Audience vs. Detailed Targeting and Lookalikes Jon Loomer
  10. A practical, opinionated playbook for what to actually set (and skip) in Ads Manager today, from someone who has been publicly... Jon Loomer Digital Article · D2C How to Approach Meta Ads Targeting Now: A Detailed Guide Jon Loomer
  11. Foxwell Digital runs Meta spend for large DTC brands, and this explains the specific mechanism (declining First-Time Impression... Foxwell Digital Article · D2C Meta Broad Targeting: Why Skipping Exclusions Works Foxwell Digital
  12. An independently run test, not a Meta-sponsored case study, that puts Advantage+ Audience next to interest targeting inside the... Search Engine Land Article · D2C Testing Meta's AI-powered Advantage+ Targeting: What We Learned and What to Expect Search Engine Land
  13. Triple Whale sits inside thousands of DTC ad accounts as an analytics tool, so this is written specifically for ecommerce... Triple Whale Article · D2C Your Creative Is Now Your Targeting: How AI-Driven Delivery Flipped the Script on Ecommerce Advertising Triple Whale
  14. AdExchanger is required reading in ad tech for a reason: this piece pushes back on the 'broad always wins' consensus and lays... AdExchanger Article · D2C For Meta Marketers, Automation Isn't Always The Advantage (But It's Complicated) AdExchanger
  15. Meta's own India-facing newsroom post on how Indian brands are using its automated ad tools, useful for a direct read of Meta's... Meta Newsroom (about.fb.com) Article · D2C Helping Indian Brands Grow Their Cross Border Business With Meta Ad Tools Meta
  16. Inc42 is India's primary startup trade press, and this piece talks directly to Indian D2C founders about the exact symptom, ad... Inc42 Article · D2C Conquering Ad Fatigue: How D2C Startups Can Revamp Their Facebook Ad Strategy Inc42
  17. The single most India-specific twist on this question: with most orders on COD and a large share coming back as RTO, an Indian... Smartbiz Help Center Article · D2C How to Reduce Return to Origin (RTO) Using Meta Events Smartbiz Help Center
  18. A named, credible Indian D2C brand and its actual targeting choice, a useful real-world data point on when a narrower,... DeltaX Report · D2C Clear Skies Ahead: Mamaearth's 102% ROAS Through Weather-Targeted Marketing DeltaX
  19. Storyboard18 is a leading Indian ad-industry publication, and this covers a homegrown tool feeding verified Indian checkout... Storyboard18 Article · D2C GoKwik Launches Kwik Ads to Boost D2C Performance Marketing Storyboard18
  20. Walks through the exact formula a founder needs to compute their own break-even number before comparing it to anyone else's... Triple Whale Article · D2C Breakeven ROAS: Definition, Formula & Why It's Essential Triple Whale
  21. Taylor Holiday's agency is the most quoted voice in DTC for reframing ROAS around profit, useful pushback against chasing a... Common Thread Collective Article · D2C Why ROAS Is a Terrible Ecommerce Metric + 3 That Actually Matter Common Thread Collective
  22. Straight from Meta: the ground truth on how the number a founder stares at every day is computed, and where it can be soft. Meta Business Help Center Article · D2C Purchases ROAS (Return on Ad Spend) Meta
  23. Explains precisely why the number a founder sees on Meta's own dashboard is not the number that should decide whether ads are... Polar Analytics Article · D2C Why Your ROAS Is Wrong: The Hidden Gaps in Shopify Attribution Polar Analytics
  24. A sharp, practitioner-written essay that takes the margin argument a level deeper than most agency blog posts: down to the SKU. Jordan Glickman Essay · D2C What Contribution Margin by SKU Reveals That ROAS Hides Jordan Glickman

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