I think this is a great way to get people to promote your book (I'm an author). However, what was missed is that we are in different countries. There are also different formats (Kindle vs hardcopy).
If you are in the US and you promote the hardcopy book this challenge works. However, if your people buy the Kindle or they buy from a different Amazon site (other than .com) we're screwed because the sale is not tracked.
It's a shame because what could have been an incredible international launch with all renegades being equal... well... it isn't.
Affiliate sales are not hard to track. Perhaps you can ask that HeroX create a new way to track affiliate sales so we all get credit.