PLuginmetrics- whats that?

i was looking in my plugin folder and saw a folder named pluginmetrics with just a config file in it with a short bit of text
------
# http://metrics.griefcraft.com
opt-out: false
guid: [randomnumbers and letters]
------

never installed a jar with that name and that link greifcraft...... was like that aint right. i just noticed this today. dont think it was there long

Looks like it could be for DeadBolt/LWC. Do you have either of those plugins?

no never installed either

the latest plugin i added was morematerials from the spout.org place

MoreMaterials uses metrics.griefcraft.com, so it created the folder.

It's just a system for plugin devs to measure how many people are currently using their plugin. All plugins listed on http://metrics.griefcraft.com will create this folder.

ok. i removed the folder and it has yet to been regenerated

It is plugin metrics by the Maker of LWC. Many plugins includign LWC, Vault, and MoreMaterials all use it to send usage data to a server in order to see detailed stats on how many people are using their plugins.
it doesn't hurt anything, but if you don't want to send your data, change opt-out to true.