Both the Debian Free Software Guidelines[1] and the GNU Free Software Definition proscribe limiting fields of endeavor. The OSD[3] borrows heavily from the DFSG.
I remember reading (alas, I can't find my source) a spokesperson for the OSI admitting to the existence of licenses that meet the OSD that they don't want to be OSI-approved because they don't add enough value versus the cost of proliferation of licenses that are substantially similar.
These definitions were written a long ago, in a time when cloud computing wasn't even a buzzword yet.
But I read them and couldn't find anything addressing fields of endeavor. GNU's "four essential freedoms", which imho are a little naive in retrospect, don't say anything about this. They say anyone should be able to "sell copies", but SSPL doesn't disallow this either.
Debian obviously didn't address it either. They clarify: " They can even try to sell it. In practice, it costs essentially no money to make electronic copies of software. Supply and demand will keep the cost down."
I.e. they only allowed it because they thought the free market will take care of it, and didn't imagine how cloud provides will become monopolies of access.
"As a result, you can buy a Debian release on several CDs for just a few USD." - Lol.. that's like trying to apply lessons from the bible to modern life.
Just to broaden the discussion, "fields of endeavor" doesn't just mean cloud services, but also whether you can prevent your software from being used in weapons, or other such morally objectionable applications.
I remember reading (alas, I can't find my source) a spokesperson for the OSI admitting to the existence of licenses that meet the OSD that they don't want to be OSI-approved because they don't add enough value versus the cost of proliferation of licenses that are substantially similar.
[1] https://www.debian.org/intro/free
[2] https://www.gnu.org/philosophy/free-sw
[3] https://opensource.org/osd