Flickr licensing payment?

Hi all,

Im not a poster here, a irregular lurker to be honest.
I received an odd private message flickr overnight and am not sure how to respond. So as with many things I thought to check boards.
It seems a guy is asking me to allow him to lease attribution to some of my photos purely to increase links to his website.

I love your photos! Would you be interested in licensing some of them to me for a month or two?
What's in it for you: Cash payment and you still own it. The photo stays in your account and all you need to do is change the attribution link for a month.
What's in it for me: I'll get some clicks and links back to my website.

My instinct is that it is dodgy, it just seems very odd. I have previously had a small number of requests for an image or two to be used publicly and always said yes provided I was attributed. Im a very casual snapper of landscapes, museums and aircraft.

Thoughts appreciated.
Tenger