I'm using PhotoShelter to host my online stock images/sales. They offer a few different pricing options, but the two main ones are Royalty-Free or Rights-Managed. It uses fotoquote for the R-M pricing and you can tweak the prices by a percentage factor to get the pricing you want, and the R-F pricing is totally set by yourself, with pricing for 500px, 1500px, 2500px and full-sized images.
You can select one pricing or the other for a particular image - but not both. So, why would you choose one over the other? Have agencies like iStock and such basically killed the Rights-Managed pricing model for stock images? Is it a question of getting at least 'something' for an image rather than having it passed over because you're using R-M pricing?
I'd be interested in learning what you guys are using, and especially why you're using it. And, if you're using both, how?