I’m sure opinions will be split on this, but as folks have said previously numbers alone are no guarantee of a UPT slot. Personally, I’d only accept CSO if you’d be happy serving out the full ADSC as a CSO; only accepting it as a hopeful step to being a pilot could just lead to disappointment and being stuck in a career you don’t really want to be in, so I wouldn’t accept it. But if you’re happy to be a CSO, I say go for it!