I’ll take a stab at this since no one else has yet… maybe this will give you a start for looking into it, anyway.
You could use IP delivery cloaking and use a 302 redirect if it matters enough to you.
I’m not sure how you would keep the “linker’s credit” since I don’t really know what that means, but I suspect there’s a way. If the “linker’s credit” is based on hits, they’ll just be credited with non-bot hits. However that works with joomla and vb, I’m sure it can be done by a competent programmer.
Cloaking may or may not be worth the trouble for you. (it’s trouble with upkeep and potential loss, I imagine.)