This is pure fud. Nothing else.
AGPL DOES NOT restrict ability to be used internally. Agpl does NOT restrict selling software as it is.
Agpl does not restrict using agpl software with proprietary software.
Only thing that agpl prevent is, IF YOU MODIFY AGPL SOFTWARE, YOU HAVE TO GIVE SOURCE CODE TO USERS. Your modifications. Thats it.
AGPL DOES NOT MANDATE upstreaming modifications. You can do it or you cannot. Your choice. Others can choose to upstream or fork or Downstream your modifications
What you are confusing with is the fud google spreads about agpl. They dont touch it because if they modify code they have to release it but they don't for reasons known to them.
Again, AGPL is NOT viral like SSPL which is like AGPL but on steroids.