Nobody has trouble pulling their money out. Getting nuked is part of the game theory. You can get your principal back once you've served half your staking length, but you would lose all the interest. If you end your stake less than half way through, then you're at risk of it cutting into your principal and if it's too early, then say bye bye to your hex. Penalties like that get paid out 50/50 to the origin address and the remaining stakers. It is what keeps the apy steady hovering around 40%. And it makes the price pump like crazy because people are locking their hex up for as long as fifteen years. Hardly anyone sells their hex, so price is up 175,000% and it's going to keep going.