A float rating with no hours won't get you anywhere
You would be suprised with some smaller operators....
It might very well get you into the pile for the filing cabinet instead of the direct route to the bucket. It shows you enjoy flying for the sake of flying. Same with alpine ratings and other fun things that pilots do and would love to continue doing after they have got a RHS gig.
It won't help you if a HR deptment filter the CV's but if you CV lands on the desk of a Chief Pilot of say a charter outfit flying Jetstrteams or Kingairs or the like. H'mm a 250 hour intergrated or a modular 250 hour or 250 hour modular + float hey look this guy has done some float flying always wanted to do that myself was going to go up to scotland but never got round to it (as hand reaches across to phone to call for an interview)