Way to clean if your intention is to make sales...
But if your intention is to provide the surfer with free pics, then you are set!
Take advantage of the advertising space and options in your galleries. 10 - 15 pics is enough for the "tease" and will get you listed at Link sites. And have at least 2 links for your sponsor.
A wise person once told me that you shouldnever allow the screen to just have the free content showing. At any one place when a sufer scrolls for the content you should be able to see the sponsor ad. So try and get a bit creative with your layout.
You CAN do this and keep your free site really clean and able to be listed at the link lists you are submitting to.
K