... overall I'd suggest uploading an image and linking it to a professional RM agency, otherwise you take on much responsibility.

The site is down because I'm finally upgrading it when its back up I'll post it.

Unless it's a worldwide exclusive use, you don't have to take a photo down after an RM license, and even then it will be time limited, so you'd restrict the use until it's available again. You do need to keep careful track of how it's used so that there are no conflicts. I often license RM photos on my own, and to date all the licensees have requested a non-exclusive right to use photos in whatever country they are in or worldwide, during a fixed period of time, from one month to 18 months, at a set size, for a certain use, calendar, magazine, newspaper, sometimes limited/ sometimes unlimited print run. I have a calculator built into my site, which is hosted by Photoshelter and I have also negotiated pricing directly with clients.

To be clear, I don't have a symbio site (am thinking about it for micro RF). However, from the experience I do have, it's been easy to license RM images on my own, but I can see that if the volume grew substantially and you didn't stay on top of it, you would potentially need some sort of software in place to prevent duplicate licenses in the event of a request for exclusivity.

I would imagine, however, that when a licensee is seeking an exclusive license, they are going to check first to be sure it's available and negotiate with you directly.

I have RM many of the same images with agencies in Germany and Wales as well as with Alamy, all on a non-exclusive basis, so they need to clear exclusive deals with me before agreeing to them. Bottom line, I don't think it's a click and download kind of thing. At least not in my experience. Sending them to Alamy or another site to license RM kind of defeats the purpose of having your own site so an agency isn't cutting into your profit.

You can always note that for an exclusive license they need to contact you directly.