This post is not going to give an answer to the question stated above. That is because I am actually not sure when to start. Start to early and there is no engaging news for your readers and they will not follow you. On the other hand if you start late, it might as well be too late because you have already launched your product and did not get enough feedback. Follow me? If the first version of your product gets a lot of attention thanks to the marketing but the product simply sucks it doesn’t help.
What would you do? At what point would you start to do some marketing?