Most of our organic traffic comes from GitHub, and not the site. That said, I would be fine with putting that info on there - it’s a question that comes up every so often.
EDIT: I have raised this on Discord.
Glowstone is a small project. We are “all hands on deck”, but “all hands” is two people at the moment. There are four people on the core team - @mastercoms as the project head and lead developer, me as a sysadmin and PR guy, @momothereal as a prolific contributor and talented developer, and @kamcio96, who is currently busy with other things.
As it stands, any “pure” bukkit, spigot or paperspigot plugin (which is to say, one that only uses the Bukkit/Spigot/PaperSpigot API and no internals) should be compatible at this point, barring the features we don’t have implemented yet. The plugins that don’t work are not strictly Bukkit plugins, and are instead have an intimate association with the server software they’re developed for.
Some developers have decided to add specific support for Glowstone, and others have decided to write plugins with Glowstone as their primary target, but we are a small project at the moment and we don’t have the infrastructure to maintain a big database of plugins - although that is coming.
We also have the Linkstone project, which attempts to add an emulation of the
net.minecraft.server package, so that plugins which rely on it will be able to work with Glowstone - but that project is currently stalled as we do not have the manpower to dedicate to it right now. Perhaps you know someone or are a developer yourself?
EDIT: I’m going to bed now, but feel free to drop by the Discord if you feel so inclined.