Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Why do card processing companies discourage “cash advance” activities
This is most likely protecting Square's relationship with Visa/Mastercard/AMEX/etc. Credit card companies typically charge their customers a much higher interest rate with no grace period on cash advances (withdrawals made from an ATM using a credit card). If you use Square to generate something that looks like a "merchandise transaction" but instead just hand over a wad of banknotes, you're forcing the credit card company to apply their cheaper "purchases" interest rate on the transaction, plus award any applicable cashback offers†, etc. Square would absolutely profit off of this, but since it would result in less revenue for the partner credit card companies, that would quickly sour the relationship and could even result in them terminating their agreements with Square altogether. † This is the kind of activity they are trying to prevent:  1. Bill yourself $5,000 for "merchandise", but instead give yourself cash.  2. Earn 1.5% cashback ($75).  3. Use $4,925 of the cash and a $75 statement credit to pay your credit card statement.  4. Pocket the difference.  5. Repeat. Note, the fees involved probably negate any potential gain shown in this example, but I'm sure with enough creative thinking someone would figure out a way to game the system if it wasn't expressly forbidden in the terms of service