We haven't had much luck with Google Ads for Postica so far. There's a lot of competition in the spam filtering market so it's hard to stand out among 10 ads for spam/virus filtering products and services on the same page.
It's frustrating having what I think is a great service, and not being able to reach potential customers. We're mostly focusing on selling through partners now, but we haven't completely given up on Google Ads yet. Here's our latest.
The state is that great fiction by which everyone tries to live at the expense of everyone else. - Frederic Bastiat