Subject to staff approval, etc etc, I’d be tickled pink to write a custom plugin for my beloved server. I do software. For money. For long time. Am kind of good at it. Enjoy it.
So, if I were to do such a thing what sort of plugin would be useful/fun?
Some ideas I’ve kicked around in the past:
1- Divination. You pay (gold ingots?) and get information on ores in nearby chunks. Not specific location but info on distance to nearest diamond, e.g., maybe info on how mined out/spent the area is, etc. Sort of like a legal, less useful/exploitable X-ray. Think of vagueness like getting a chat message (only you see) that says “you smell diamond nearby” when it’s within 10 blocks, etc.
2- Curses. What if you did something bad and creepers sought you out while you were mining, even in lot areas? Maybe your weapons or armor broke with increased frequency. Or maybe mobs don’t drop goodies as often. Offers incentive to quest for a cure, raise resources to craft an offering to the server admin/healer for respite, etc.
3- Natural disasters/bounties. Wheat fields go fallow, small ponds drain, fires break out and set your hut on fire. Or crops grow faster, animals mate or change colors (e.g. sheep), new ore veins form after rains wash trace minerals together in caves.
4- Torch lifetime. Once in a while they run out. I mean how is it possible they last forever? They’re just a small amount of wood and coal. Could exempt claims so your house doesn’t become a mob factory.
These ideas aren’t fixed but just offer a starting point to show the sort of things that are possible. Heck a few of these might already exists. Just throwing some out to see what others come up with.