I haven't tried iTunes Boss myself yet but thanks for the heads up because it certainly looks like a good idea! The two things I would mention about this scheme is:
1. There are plenty of "referral" schemes on the internet. It's possible this is one of them.
2. If in doubt, maybe contacting iTunes and asking them whether something like iTunes Boss is legitimate and in accordance with their policies. If it is above board, iTunes won't have a problem with it either.
From what I can see I have no reason to doubt it, they aren't asking for money (which to me would be a clear indication of a scam) and there are no complaints that I can see regarding it on social media, so I am guessing that equates to happy users!
It's just a case of getting 15 people to visit the site and to be honest, that shouldn't be too difficult as you can offer to do the same for them so that they can get their code.
My advice would be to give it a try, you don't seem to have anything to lose and if you are stuck for ways to promote it you could always try YouTube, as this guy has :
