You can't just keep claiming there's a field of use restriction when there isn't. It merely conveys a requirement for open sourcing dependencies required for operating services, an entirely noble copyleft behavior.
Any business which isn't exploiting open source in order to benefit proprietary source won't even be phased by this. It's simply a requirement to open source your stuff, which the OSI would support if supporting open source was actually their mission.
OK, I believe I understand the distinction you're making here.
I had to fight my way through your aspersions about the motivations of the people who take part in OSI license discussions, some of whom I am personally acquainted with. I consider the notion that they are driven by allegiance to Amazon and the like risible, although you don't have to take my word for it (and shouldn't, it's an argument from [negligible] authority).
The idea is that a "field-of-use restriction" should deny a license grant based on field-of-use, as opposed to granting a right to users to obtain source code based on field-of-use. This seems like a technicality when the obvious effect is to cripple commercial competition which some see as illegitimate and advantage certain other parties — something completely at odds with the idea that Open Source software needs to be available for any use, deeply cherished by myself and many other FOSS advocates.
For what it's worth, while I generally support, develop, and use open source software, I think "freedom 0" is somewhat problematic. Beyond the fact that I feel us doing labor to support the common good should not inherently require it be usable for corporate greed (I think a noncommercial license shouldn't be treated as a sin by the open source crowd), I think there's a sort of Paradox of Tolerance issue if you allow proprietary developers to compete directly with open source developers using their own code.
If we aren't able to say "hey, this is for open source use only", companies unburdened by ethics will always have a market advantage over ethical open source companies, and that in the long term will ensure open source doesn't win.
Any business which isn't exploiting open source in order to benefit proprietary source won't even be phased by this. It's simply a requirement to open source your stuff, which the OSI would support if supporting open source was actually their mission.