Using social media promotion isn't really bad thing but considering that even there are lots of people or traffic on it but it wont really signifies that you will able to get huge percentage when it comes to investors since most of those people aren't have the awareness when it comes to crypto investment.I would rather believe that forum advertising is much more effective than on this one.
Having target investors is the real score for advertising an ICO to the forum of cryptocurrencies like bitcointalk. But also there are many people who are not yet aware of ICO's, crypto's or bitcoin in the world but they know how to use social medias. Before it was a good way of advertising because it can get many target viewers that are really gathered by social medias just for the advertiser but some websites now are not allowing ICO related advertisements like in facebook.
Already there are millions of people daily interacting with the ICO website but the thing is people are researching about the company before investing into it. So it is always good to find the target user's and there are many other ICO listing, people also getting awareness about the project through those sites but most of the people are addicted to Bitcointalk forum.
Do you have proof of that claim that there are millions of people that are interacting daily with ICO websites? I don't think that there are that much people who are dealing everyday with ICO's. What's on my mind is there are few investors but they have big money to invest in ICO's and these people can be reached out through social medias but most of the time they are staying in forums. Not only here in bitcointalk but also in other forums that are very popular with ICO discussions.