Did they give a timeline to respond? Perhaps the plan was to send the notices out super early to weed people out who weren't willing to accept a recall blindly so that when material growth does occur in a few years, their costs will be lower by having to hire again at first year pay. Also a smaller TSA list does clean things up a bit between TSA/GoJet shenanigans that might occur in the future. Its easier to deal with 200+ pilots than nearly 400.
I'm just sayin....