Yep, 6.7M after taxes = 20M/3 years...Also, just like a bunch of people have pointed to MB, the club pays the taxes. No, the IRS isn't gonna go hunt down Mr. Childress.
The effective tax rate in Atlanta is ((33M/5) - 3.4M)/(33M/5) = .485 = 48.5%. I'm guessing Atlanta has state income tax... At that rate, to net 6.7M per year is 13M per year. This is pretty close to an NBA max contract for 3 years. When you add in the side benefits, luxury accommodations, maid service, car and driver, it's probably very close (possibly even better) to an NBA max contract from Childress's perspective. This is overpaying in a big way for Childress, IMO. If they are willing to spend this kind of money for Childress, the rest of the NBA has to start paying attention to Europe.
It should also be noted that the effective Tax rate being paid for Childress is much less than the Atlanta local rate. (32.5M-20M)/(32.5) = 38.5%...