I'm thinking about how to handle a payment system which is similar to AdSense or some other advertising network. Advertisers pay some relatively large chunk of cash for each advert, a percentage of the money from multiple adverts is then paid out to multiple publishers. Some publishers could be earning very small amounts monthly, others could be earning more.
Is this kind of thing easy to setup? Are there any legal issues with payments to publishers in the above? Would PayPal or others be concerned about money laundering via such a system?