"I did X because I wanted to do X" is not a meaningful motive unless X is intrinsically pleasurable.

Unless you mean pleasurable in a broader sense than equal, that's not necessarily the case. People can have other terminal values besides pleasure. (But I agree that being signed up for cryonics is unlikely to be one.)

Sure you do, otherwise, how do you expect to pay the premiums?

I think she means that P(she will able to afford the premiums|she signs up now) is close to 1 and P(she will able to afford the premiums|she signs up in her late forties) isn't, not that the former is literally 1.