as i thought, that's not a proven way, even urself still in doubt.
anyway, my point is, that might not increase ur PR drastically but it will allow your site to be listed in search engine easily. Good idea though but it wont increase ur traffic alot, since u might not get high PR that way and u wont be spotted easily from the catalogue site since there are many other products too, unless u pay.

That's in my opinion, i'm not sure what will others think.