Riot Block MC is a new prison server that tries to keep things fair. It is not pay to win and it is not one of those super OP prisons. The whole point is balanced progression and stuff that feels earned.
There is a big area called the Wardens Lair and it is a huge cave system with mobs. When you beat them they drop cash. You can also explore deeper and find hidden dungeons with unique loot and good rewards.
If you like the classic prison loop it has a mine and grind progression system. It also has dozens of custom enchants and regular community events. It supports Java 1.21+ and Bedrock too.
They also run a St Patricks Day event for 24 hours starting at 12:00AM PST March 17th where you can mine hunt mobs in dungeons or fish to earn keys.
