My assumption is that getting frozen means giving up all control over what, if anything, happens to the dead frozen piece of organic matter that you used to identify with. With high probability it will get discarded within the next century, due to a failure of the some sort, technical, economical or political. There is a very unlikely eventuality of it being used for recovery of the informational content, even less likely eventuality that the recovery process will result in some sort of self-awareness, and the chance is even more remote that it would be anything resembling the kind of "life" that you hope for when you sign up. if this is a baseline (and if you are more optimistic than that, then I want some of what you are on), then the decision to sign up for cryonics is between a near-certain extinguishing of your identity (not absolutely certain, as there is always a vanishingly small chance that we can be simulated from the information available) and a tiny chance of revival in some form, and in various number of copies/clones of varying faithfulness/awareness/intelligence, maybe to live happily forever, maybe to be tortured forever, maybe the whole spectrum in between.
If your question is whether the odds of happy resurrection are lowered by taking into account S-risks, then my answer is that they are already so low, S-risk doesn't even enter into it.
Still, I'd take my chances and get frozen rather than, say, cremated. Because to me personally, non-existence is worse. Your outlook is likely to be different.