Bloomsbury is an English company
https://en.m.wikipedia.org/wiki/Bloomsbury_Publishing
Bloomsbury acquired Osprey from the previous owners , a venture capital fund. So I’d consider this sale a good sign, as Osprey is now owned by a proper publisher again as opposed to a firm that has no real interest in publishing, just turning a quick and easy profit.
https://en.m.wikipedia.org/wiki/Osprey_Publishing
Contains a brief history of Osprey
So in spite of the doomsayers I’d say Osprey is going to be around and publishing for a while yet.
As to discontinuing WW1 publishing I don’t know where you would get that idea. There’s at least two Campaign titles on ww1 this year. Some combat titles a recent fortress title and some general history books. WWI will always be the poor cousin to WW2 when it comes to Osprey but at least it’s something. My main area of interest is the SCW and I’m not holding my breath for any new Osprey title there!