Nice acronym, by the way. It just needs a T on the end.
Anyway, there’s not much to see here unless you’re a US citizen living outside of the United States. Most US companies paying non-US citizens are obliged to withold a 30% chunk of earnings until an EIN and/or local national insurance/social security number has been produced. Amazon is one such company. Fiverr is an Israeli company so isn’t beholden to that standard (though I understand Israeli sellers/buyers have to do some extra tax stuff).
As for Payoneer and PayPal, I don’t really know, but they just shuffle money about, so I’m not sure they’re included. Anyway, bit of a non-story here, I think, especially compared to TTIP, and that’s why nobody responded, I imagine.
FUN FACT: taxing non-resident citizens isn’t the global norm. The US does it, as does Libya and North Korea to mention a couple of examples. Most countries tax their resident populations only. God bless Uncle Sam!