The ones really screwed by this regulation are those who cannot set up a non-EU operator, i.e. private owner-pilots.
Any rental operation, even at the light GA level, can set up a non EU company which runs the booking website.
It is an idiotic proposal from idiots whose #1 job is hating the USA (because Europe is morally and intellectually superior, of course...) and they are using GA as a hammer to beat the USA around the head with.