After the launch of project they wouldn't need as much marketing as for the ICO, did facebook ever did marketing ?
Yes of course they did.
You are only remembering facebook now and recent past. There were doing heavy marketing in the beginning.
They were? I thought it spread through word of mouth across colleges. In fact you had to have an e-mail address issued by a university. Or maybe I am talking about the very beginning.
I am quite sure they had nearly no avertisement and most traffic generated through WoM. That with the email at universities was in the very early beginning.
You are right. Facebook didn't do much marketing but sphere will need to do as the era is completely changed now.
Depends on the time what you mean with "beginning".
Think they did no marketing to any king of endusers. They spend a lot of money for marketing to get advertising partners to earn the money.