I don't understand the distinction being made. The chance of revival and peace of mind aren't separate things: it is the former that causes the latter.
If you are not a cryonics member, what would make you decide that it is a good idea?
I don't think it's a crazy idea, but I'm not signed up. I might reconsider after some leaps and bounds in the technology, like successful short-term freezing and revival of humans. I am not expecting to see that within my expected lifespan.
Would you reconsider if you saw successful revival of a small organism? C. Elegans? A mouse?
I wrote a blog post arguing that people sign up for cryo more for peace of mind than for immortality. This suggests that cryo organizations should market towards the former desire than the latter (you can think of it as marketing to near mode rather than far mode, in Hansonian terms).
http://specterdefied.blogspot.com/2015/06/a-cryo-membership-buys-peace-of-mind.html
For those signed up already, does peace-of-mind resonate as a benefit of your membership?
If you are not a cryonics member, what would make you decide that it is a good idea?