Which all platforms and advertising agencies?
Who are the people who make an ICO successful?
How much upfront budget is normally being spend on ICO Marketing & Advertising?
The best way for you is to use the social medias, there are billions of people on social medias everyday which means that they are the best place to get to the most amount of people all from around the world who are willing to invest in your ico. This is why bounties is one of the most effective ways to promote an ico, most especially social media bounties
Yeah, I agree. But it's not enough. You need to have an agency who are experts in helping start-ups, who can identify what's the best type of community to have on your projects. It's still a project to project basis. No one does have a community full of investors, but there's a community full of user, full of fanboy etc. Not to shill for Crowdcreate, but check their case studies(https://crowdcreate.us), it makes sense.