&quot;The founder of Coinbase actually left his job at Airbnb to start a Bitcoin company once he realized that credit card fees ate up nearly half of Airbnb’s profit margins.&quot;<p>This is so true, and a weakness in cc wth the rise of marketplaces.<p>I started a side project, a marketplace due to very low margins of suppliers the max we could get in transaction fee including cc processing was 10%.<p>We did not want to add markups on in store price so had to absorb the costs.<p>Take a transaction of $100 , e.g you pay 3% fee&#x2F;$3. For the merchant it is 3% but for you its actually 30%