Amazon Flexible Payment Services has functionality built in to allow sellers to receive payment directly into their Amazon Payments Business account rather than going to the marketplace owner. (See this marketplace example.) This money can then be withdrawn at the leisure of the seller.
The nice thing about this setup is that I, as the marketplace owner, don't have to hassle with monthly payouts to my sellers. Plus, the seller has the piece of mind to withdraw the funds whenever.
1) Do you know of any other places that offer this functionality?
2) Or do you have any other ideas for how I could reduce the hassle of doing monthly payouts to the sellers?