Is there any reason not to sign up for rakeback?

[Salva135]

OK, so I'm a long time bonus whore who has finally decided to look into rakeback (I had signed up for a lot of my accounts well before I knew anything about rakeback), and I'm just curious to know if there's any reason not to sign up for a new site through an affiliate. I mean, are there are any disadvantages to doing this, or are you really just an idiot for passing up free money?

I'm planning on signing up on Eurobet to tackle their $600 bonus, and thought it might be worthwhile to sign up through an affiliate for rakeback as well. My understanding is that the $600 in bonus money is deducted from my MGR, thus reducing the amount of rakeback I receive, but I'm still getting money back on top of that bonus, right?

Sorry if this is such a newbie question...