Why dont you guys think like the fish and not the fisherman???
Seriously, I think it is quite obvious that redirected traffic will NEVER convert as well as SE traffic...
Think about it, you go on google, you want to buy a sports bag, you type "buy sports bag", you check the links relevant and thats it.
Now imagine you are checking some pinterest account with images about football, then you see a link which says "get your sports bags here".
YEs, it is relevant, yes you might have interest, but while searching on pinterest you are simply browsing pictures with no specific aim, meantime while you are typing a kw on google you are loooking for something very specific...
All in all just put yourselves into the customers' shoes