[BScout]

Yes, I've been making subfolders by manufacturer for a long time (so much easier to keep them updated.)

The only thing to be aware is when doing updates, you have to drag the new version into the subfolder again (and copy over the old) because the installer won't be aware to do that and will put the updated version in the root plugin folder. Also, for some plugins (like Spanner) there are additional files that get installed in the plugin folder (plugin mapping setups for Spanner) and you have to move all of them to the subfolder since the plugin looks for those files relative to where the main plugin file is located.