One of the comments to the blog post mentioned that if you have good word of mouth you don't need to worry about these strategies. I don't think this is true, of course there have been notable exceptions but in general unless you have reached the household name status of Microsoft, Apple, Google ect there is always an untapped market out there of people that would gladly be customers of your product if only they knew about it.

Even with the big companies still not everyone knows that about all their products that they may be interested in.