Participating in some bounties, I noticed paid advertising of these projects on CMC, Youtube. From this it can be concluded that those projects that are trying to work, use all possible means to attract investors.
Many projects use different advertising. As practice shows, media bounties (YouTube) are much more effective
It is not necessary to state unequivocally what type of advertising is better than another. It is necessary to use all available advertising options, then the result of ICO will be positive.
Some projects refuse from this or that kind of advertising for economy of means
If I were promoting my product, I would use all possible types of advertising in order to quickly interest people