Well, how many do _you_ have by the way? Since I used your code (just to be sure, as Bruce mentioned 5% and you wrote something about 10%, I didn't want to have any risks) I guess you also should be beyound the 100 ref-mark!
I currently have... *checking*... 112 Users referred and earned 4.85 USD from them - just ~2 times more and I get a free meal at McDonald's! Yay!
I really like referal systems like Dropbox + Tradehill, where both the referred user AND the "referral giver" (?) do benefit instead of just benefitting one party.
What really get's annoying though is how many people started to spam after some time... just put it away in your sig and post constructively. It will be noted!
I doubt that getting 200 referred users via a spam thread will see as many trades (and in the end income) as 50 users that take some time and want to reward someone by using their reflink.
One fact that I don't like is, that ref-income is in USD. I don't use USD, it constantly looses value against my currency and is imho about to crash - but I always have to wait until there is at least 1 USD in my account to be able to convert to BTC. I also fear the some day I will have 15 US cents, 8 Eurocents, 30 Pesos, 2 Yen... Bottom line: I want my ref-income in BTC - after all, this is a BTC exchange!
@bitcoinconnection: To see how many ppl. you referred, click on your user name/email address in the top right corner, you then get a full account overview or (if you dare
) use the link https://www.tradehill.com/User/Profile/