Yes and no. You are saving the hospital on their readmission penalties, but those currently only apply for three conditions (CHF is one of them). Furthermore, the penalties are not always enough to cover the increased revenue that the hospital gets from the readmission - in other words, some hospitals may actually make a profit from the readmission even when the penalty is factored in.
Also, the "up to 2%" is itself complicated. Because of the way the penalty is deducted, other seemingly-unrelated factors (like the patient and insurance demographics of the hospital) have a huge impact on how large the penalty is, even holding everything else constant.
> Hospitals can and should be charged for this
Currently, even the hospitals that receive the highest readmission penalties are not willing or able to pay (much) money for reducing readmissions. The way their budgets are structured doesn't really allow for this[0].
I say this from experience - my startup also creates a product that happens to reduce readmissions (though this is not our primary goal), and one of the reasons that we emphasize our other (larger) benefits for the hospitals is that most hospitals just won't pay much for a product that reduces readmissions.
On top of that, it's also a very crowded space. Health Recovery Solutions is a for-profit company that does more or less the same thing: http://www.healthrecoverysolutions.com/
[0] Yes, it's inefficient, but that's a separate discussion.
It's not as clear to me, as a non-profit solution, as something like Watsi would be. I'm familiar with HRS, I saw their Blueprint presentation and get their email updates, but should a reason to run a company as a non-profit be because there are already too many for profits in the same business? There may be a number of companies in this space, but this is all still pretty early stage, with no clear winner yet.
That's the goal, but that's not how it actually works out in practice - look at the details of how the penalties are levied, and you'll see why.
If they were implemented perfectly, that would be true. Or if all payers used a bundled payment system, that would be true. But neither of those are the case (at least not now).
(An easy way to see this is to see that there is a cap for the maximum penalty - so if the total amount made on readmissions is larger than this cap, the hospital would still make money overall[0].)
[0] Of course, nothing can be simple (that would be too easy!), so the actual way that these are calculated is even more convoluted - take a look if you're interested, but don't say I didn't warn you. :)