Empire Royal Flush Club: Free $100/month, Does it Affect Rake?

[XChamp]

So I've been feeling prety smug about my free $100 a month from Empire (ok, I had to deposit $1,000 to get it, but that took 3 clicks), but I just realized that it might not really be free. Are they taking that out of my rakeback? Don't they do that for deposit bonuses? I never do the deposit bonuses because I figure they don't really help me since I play at a minimum 10k+ hands a month.

Can anyone help me out on this?