Not sure if this is the right place to ask, but I'm the author of the ProductWidgets plugin and if you look at the plugin description you will notice the tags don't show up at the bottom. The plugin also doesn't appear on any of the tag pages.
The tags in the readme.txt of the plugin are: affiliate widget, affiliate widgets, affiliate, affiliate plugin, affiliate plugins, affiliate marketing, amazon affiliate, amazon affiliates, amazon associate, amazon associates
The only rules for tags I could find is that there should be at most 12 of them, I have 10, so that should be okay.
Can anyone think of another reason why they don't show up?
Thanks!