Depends on which CIG. So many companies, so many ways to shift things around. Loans can be issued between companies of the same group. Licensing fees, operational fees etc.
It is magic.
Well, we know one company holds the IP, which is a typical tax dodge, where you basically charge another company you own 100% of what they earn for the right to use the IP, then that company (usually located in a nice tax haven) reports profit while the other doesn't have any profit.
Interestingly enough, was reading about a new law they are trying to pass in the US to shut down this sort of tax dodge. I doubt it will pass as the corps will buy the appropriate senators, erm.. i mean public interest groups will voice their concerns, and it will get shot down.
But if it did pass, it would have some ramifications for many companies that operate in the USA, including CIG. Well, at least until the lawyers and accountants find a way around the new laws.