> The people storing popsicles don't necessarily need to have anything to do with the people who dream of someday unthawing them.

Generally speaking the thing they have in common is the funding required to do the cryonic enterprise.

> If some rich person wants to pay to keep an expensive freezer running for a specified amount of time after they die, that creates a sound business opportunity for someone who is willing and capable of running a freezer.

The question is "why would some rich person want to pay to keep a freezer running after they die?" in the case of cryonics the answer is usually because they have some expectation that they could be unfrozen and revived in the future.