http://www.cashbackforex.com/ , which I have some good experience with them, so far.
I opened my FXDD account first, funded them and has been trading for a few months, then I got to know someone that work with IB (intorducing broker) and can get rebates from my transaction, I joint him by informing FXDD that I wish xx to be my IB, FXDD allowed it and I have been received rebates for months or about a year. Then the rebate get disrupted and finally disappeared eventually about 1+ years later.
I hunt for another IB and I came across http://www.cashbackforex.com/ after some research over the net. I asked FXDD to list them as my new IB, they allowed it. I has been receiving my rebates since then (Jan 2011). So far so good, no disruption. Just not sure how long it will last.
In the whole process, there is no money past to IB. Funding of my trading account was done through FXDD directly. And their payment so far is quite prompt and precise. By 25th of the following month, I receive rebates based on my traded volume in my paypal account. I don't pay a single cent to IB. I think it is worthwile to take a look if your current broker is listed.
2. When I click on http://www.cashbackforex.cz/en/index.php , I realised that there is a referring code behind the URL. I think this site owner is a member of this IB, like me, that was given a referrer ID, which enable me to get a small token from the volume my referee has traded. See http://www.cashbackforex.com/ for details.
So I don't think it is a scam.
Hope that my above info help.
PS: if anyone here wish to be my referree and let me earn a few bucks as referrer fee, please PM me and I will past you my referrer code