I know several people mentioned their Google Adwords stuff stopped working. I just now got around to looking into the issue and it looks like they've updated how copyright and trademarked material it filtered. So an advertisement with the word Amazon would automatically get flagged and thus not shown. However, I've inquired with their specialist to see it subtle changes which technically change the phrase would work. So in this example "MyAmazon" would automatically flag, but technically it's not trademarked and therefore we may soon be able to use it. This would be great for compound word trademarks since we could once again have a "Drop Box" ad without violating a "Dropbox" trademark.