If you add in the possibility of radar information being provided by units that are not radar qualified it gets more tricky.
I think that's a bit of a circular argument, because "radar qualified" is defined in terms of the existing system, under which a RAS is based on massive (for GA) spacing and is thus next to useless (even if it is available which is unlikely on days you need it) and RIS is not allowed to give you avoidance suggestions.
ATC provider A might justifiably complain at having to pay considerably more than ATC provider B for the same data.
That's the fault of the accounting system. The marginal cost of the data is close to zero.
And finally from a security perspective it's not difficult to see that certain persons would find easier access to radar feeds of some practical use for nefarious activities
I wouldn't suggest having it on an open website. Anyway, terrorists can get good enough info (where to position oneself with a stinger missile) from notams right now.
The other thing is that you can already buy that box from Kinetic which gives you virtual radar. The cat is out of the bag as far as tracking CAT traffic goes. The only defence CAT has from shoulder launched (heat seeking) missiles is a fairly rapid climb/descent; above about 10k feet they won't work.