I used this method when I first started out, but ditched it for two reasons. One, I felt that were Google or Yahoo, or anyone for that matter, to cast an eye over my sites for manual approval, that might leave them with a bad taste. Better to be totally upfront. Secondly, I think players who find a site useful won’t generally mind affiliate links. Some people may bypass them of course, but I’ve not seen any drop in the % of clicks to views since changing it.
As a player, or even as a shopper, I prefer sites to be “open” about how things work. I don’t like feeling like I am being duped and am more likely to bypass a link or Google the casino/product if I think I am.