Wouldn't they get interested once the amount of money in the trust keeping you frozen exceeds the cost of reviving you?

I don't expect that money to grow much. We're taking out 1% each year for maintenance, so unless the real return is consistently a good bit higher the money doesn't grow much if at all.

wouldn't they just move the bodies to somewhere where it's still legal?

This is expensive, moving bodies away might be illegal, most other countries are less stable. But yes, it might well be prohibited in a way that has basically no effect.