I've read your support and advice to Music_Freak and it sounded very sensible. I think this might be the first time you have had a thread of your own, please excuse me if I've missed another.
I would think there are advantages and downsides whichever way you go. If you disclose there is a subsidy that comes with you that may well induce someone to hire you.
If it is a subsidy that expires however some employers will terminate your position and then hire another with a new subsidy, thus continually employing people for less than they should and abandoning them.
If it is permanent then this particular problem goes away, the other downside being that you might be hired because you are cheap, and treated that way.
So I guess it is s judgment call, and maybe talking about the job with the prospective employer (if you get the chance) might help you decide.
If you do wish to advise there is a subsidy I see nothing wrong in mentioning it in your application, the potential employer may well be aware of it anyway.
Another thing to consider is it is often easier to get a job if you already have one, so you might give thought to using the inducement as a stepping stone to finding the job that is right for you, rather than just taking anything long-term.
Ideally you get employed for your skills, work ethic and abilities and for potential development, but sometimes that's a bit of a pipe dream. Even so some employers will look for employee qualities rather than a discount, and they are probably the ones you will be happiest with.
So sorry, no concrete answers, just a few thoughts -what do you think?