It’s actually suggested by google to link to an affi program, or any other sponsored link with a nofollow.
coocoo affiliate program quoted by Merlin wrote:
“As we grow, You will grow”
I do believe they have that backwards 
perhaps it was a language barrier? (tehehe)
EDIT:
I’ve rethought my position on the above – “As We Grow , You Will Grow”.
That means I should get a link from THEM right? Now that’s a good idea! I think in addition to payments, whether are flat fee based or affiliate based, we should require a backlink! So that as ‘They Grow.. We Grow! ‘:roflmao:
LadyH