I don't really see what's wrong with this. He even said you can remove the code. Besides that it actually is an informative email. He's just giving you a sort of voluntary place to tip?
+1
At the very least we will remove all the referrals from this users account.
Why?
As said just above, he even said one's could remove the referral code
We simply cannot condone using stolen information to promote TradeHill.