""reduced adware 2" - Not sure about that one either, but some plugins display more or less unobtrusive notes on the created website like "Created with XYZ Plugin.""
Plugins cannot display any link without you saying Yes.
There should be a checkbox, it should be UNchecked and the plugin must work perfectly if you do not want that link. Any plugin that breaks this rule is removed until they fix it. So if you install a plugin and it adds a link without asking? Tell us.
That's Point 7 of the above link.
If a plugin is sending your data anywhere it must say so. If we get told - or we find - that a plugin is breaking privacy it will be removed until fixed.
Point 7 also covers ads. If by me looking at a plugin page in my own blog admin the plugin author can know this because they remote load an image then that's not good. Every image in your plugin should load locally. The only exception to this is when it has to load remotely and you have been told of this when activating the plugin.
Point 7 does not cover feeds. The default dashboard pulls in feeds and that's fine for plugins.
PRO versions are okay but they too need to be GPL. The version we host here must not be crippled. That's a judgement call but I don't think we've got one wrong in this area before.
The directory is being overhauled at present and information will be presented differently for some things.
And the forums and support will always reply so do ask :)