I've sent concise pitches about my startup (general, and for various features) to around 20 tech journalists from tech blogs/sites (Mashable, Techcrunch, TNW, RRW, Lifehacker, Venturebeat, etc.), both to their own emails and to the designated pitch email. I got 0 signups, and just one reply (after I repeated a previous pitch due to suspicion that my emails may have been treated as spam). Note that I haven't contacted random people - I have selected them based on the articles they have written, which were on similar topics to my startup. And I have pitched them at different times, a couple of them for each new feature (not one email to all of them at the same time).
Is this the regular case? My expectations were that they would decide not to write about something after they've seen it in action. My homepage is not so repulsive and lame. One option is that they decided based on the list of features, which does not require registration, but I would still signup to see how it actually works.
Should I continue sending pitches about new functionality? I've read a couple of times that you should send pitches as often as possible, but this sounds a bit rude: sending similar information over and over to the same people until you 'break their defense'. I'm constantly looking for new people to send pitches.