The actual patches on the gamers are made by Nike. They use the same kind of twill, that matte stuff with the softer finish. This wasn't available on retail authentics until this year. Nike started producing retail authentics with the ad patches, in factory.
What mostly happens in stadium shops, they get blank shells from Nike. Then, they outsource lettering to whatever company they want. It could be local or a big company like Silver Crystal trash. Those secondary companies sublimate and make their own ad patches, sewn with the name and numbers.
So, the stuff people make and sell online is not really any less "authentic" than what the pro shops are doing.
This gets a little complicated this year because Nike may or may not send blank shells with pre-attached Nike-made ad patches. That's slightly off-topic though.