The restriction doesn’t only apply to large corporations, it applies to everybody. It restricts what you can do with it so it breaks the fundamental freedoms that make up “FOSS”. As an immediate result it will be removed from Fedora and Debian because they don’t consider SSPL/RSAL to be FOSS:
https://gitlab.com/fedora/legal/fedora-license-data/-/issues/497
it breaks the fundamental freedoms that make up “FOSS”
Why? All the license says is that if you provide it as a service you must release the source code.
It says that you must release all your source code, even the stuff that isn’t covered by the license. From Wikipedia:
anyone who offers the functionality of SSPL-licensed software to third-parties as a service must release the entirety of their source code, including all software, APIs, and other software that would be required for a user to run an instance of the service themselves,
Fedora and debian support the corporate definitions of FOSS, so their opinions do not matter here.
it applies to everybody
I don’t think most of us want to offer services by hosting a service without contributing back the code. If they do, I am happy that it is a requirement that they give back. Only for-profit companies will have an issue with this.