Someone on that thread posted they were using Stripe as their processor.
Check this out:
https://stripe.com/us/prohibited-businessesThe following categories of businesses and business practices are prohibited from using the Stripe Service (Prohibited Businesses). Most Prohibited Business categories are imposed by Card Network rules or the requirements of our banking providers or processors. The types of businesses listed in the right column are representative, but not exhaustive. If you are uncertain as to whether your business is a Prohibited Business, or have questions about how these requirements apply to you, please contact us.
By registering for Stripe, you are confirming that you will not use the Service to accept payments in connection with the following businesses, business activities or business practices.
Financial and professional services
Investment & credit services: Securities brokers; mortgage consulting or debt reduction services; credit counseling or repair; real estate opportunities; lending instruments
Money and legal services: Money transmitters, check cashing, wire transfers, money orders; currency exchanges or dealers; bail bonds; collections agencies; law firms collecting funds for any purpose other than to pay fees owed to the firm for services provided by the firm (e.g., firms cannot use Stripe to hold client funds, collection or settlement amounts, disputed funds, etc.)
Virtual currency or stored value: Virtual currency that can be monetized, resold, or converted to physical or digital products and services or otherwise exit the virtual world (e.g., Bitcoin); sale of stored value or credits maintained, accepted and issued by anyone other than the seller
So what kind of bullshit are they using to get around the prohibited business rule?