Their USP may be that they navigate the problem of payment providers etc. Getting money for porn and weed is notoriously hard because very few of the intermediary participants are willing to play along if that's the use case.

For instance, see Paypal https://www.paypal.com/us/webapps/mpp/ua/acceptableuse-full

> You may not use the PayPal service for activities that:

> ...relate to transactions involving...

> ...certain sexually oriented materials or services...