I would like to request adding the plugin "Upgradable Hoppers", it has really cool features, such as linking containers from far away, item suction which is basically just a thing where the hopper can pick up items next to it, even if they aren't on top of it and even upgrades for the suction range and the container linking. This plugin will also definitely improve a server's performance, because it will reduce the hopper amount by a lot, because of it's features. The tested versions of the plugin are 1.13 up to 1.16. I also do know the plugin costs 12€, but as I've seen the mines plugin for example is also a paid plugin, but minehut got permission to use it.
Spigot Page: https://www.spigotmc.org/resources/upgradeable-hoppers-fast-hopper-plugin-link-containers-item-transfer-suction-filter-1-16-support.69201/
Github Page: https://github.com/Angeschossen/UpgradeableHoppers
Wiki Page: https://github.com/Angeschossen/UpgradeableHoppers/wiki