private mines

Most reset on a fixed timer, when the mine is mostly mined out, or when you use a reset command if you have access. The goal is predictable availability so progression depends on your upgrades and time spent mining, not on waiting for blocks to regenerate.

Often, yes. Many servers disable PvP in private mines and restrict access to you and invited visitors. Some allow open visits for mine parties or shared boosters, but the space is still designed to be lower-risk than public mines.

They can if prices, ranks, and upgrade scaling are loose. In tighter economies, private mines do not remove the grind, they shift it toward throughput and planning: choosing upgrades, timing boosters, and keeping up with rank and prestige costs while competing with other players doing the same.

Commonly, yes, but usually through progression. Typical upgrades include larger mine size, better block composition, and convenience perks like auto-sell or auto-smelt. Customization tends to be gated so early mines stay simple and later ranks feel meaningfully stronger.

Quick, reliable resets; clear steps between mines; upgrades that noticeably increase speed without breaking the economy; and strong reasons to leave your instance, like leaderboards, player trading, gangs, and server-wide events.