StockManick - I saw this website when I first started and I think the only thing he updates is the monthly earnings and the graphs (or are these automatic) so all the info is probably out of date unless he can be bothered updating when he updates his earnings.
I've wondered how much of his revenue was from his photos and how much was from the referrals.
I wondered this also but the numbers dont look too skewed toward shutterstock compared to the others to suggest excessive referral income.
... but it seems sketchy when a person tries to hide the fact that it's a referral.
I dont have such a problem with this. The internet is all about advertising and if you advertise for someone, you should get paid. it would only be dodgy if the referee was somehow disadvantaged which is not the case.
If I had a website, I would do a similar thing on one of its pages.