Google is slowly going towards "I'm feeling lucky"-and-you-don't-even-need-a-search-term-but-the-ads-are-still-targeted (http://imgur.com/hiOnsKI). But I wonder why there is no ads on Google's homepage (they often already know what you were looking at).
physical signatures are almost as useless as a digital signature... some people (at least 2) just escaped jail in Florida using faked judge signature ... http://www.nytimes.com/2013/10/23/us/florida-officials-say-2... (everyone should switch from checks to bitcoins)
one reason might be that the market is much smaller for those then for fans or filters separately (smaller order quantities for the manufacturer = higher costs)