Netflix hasn't, to my knowledge, even filed their 2018 annual yet (or their Q4 2018), so I'm not sure what they're even basing their numbers on. But they admit elsewhere that Netflix paid taxes most of the preceding years, averaging out around 13.5%. In the end their tax lawyers do exactly what tax lawyers do, and unless they're breaking the law so be it.

As an aside, it's rich that it's always Americans complaining about companies paying low American taxes on billions that they make overseas. Netflix is more international than American now (2/3rds of their subscribers are not Americans), yet they are especially adept at avoiding taxes everywhere else. In the UK they have repeatedly paid $0 because they claim to be a Netherlands operation there, etc. In Canada every single competitor has to charge a sales tax of 13% (and consumers weigh the total cost, so if applied it would put downward pressure on Netflix's prices), but Netflix charges none.

In any case, corporate tax rates are often much ado about nothing because in the end that money ends up in various other tax brackets. It becomes a capital gain, or a dividend, or some other form that often gets taxed at the personal level.