What does Buffer, Blocks smartwatches, and Product Hunt have in common? They started gaining traction by tweeting to people.

Here is an idea. How about instead of pouring early money into Google or Facebook Ads start with something less scalable but far more effective — tweeting to people.

Let’s be honest. Finding people that will be interested in buying your (unknown) product is the hardest thing to do in a startup. It doesn’t necessarily mean that you have a bad product — nowadays it is just not enough to build it and expect people to come.

The key is to…