I never said bounties are not effective but it should only be used to create and reward their community not to bring in investors. If a project wants to promote it crowdsale then the team should deploy real promotional means like paying top influencers, attending conferences, advertisements on top sites like coinmarketcap, etc. Because no matter how good the project is, if it can't market properly then it won't reach its goals and if a project is mediocre but have a top notch marketing program, it will succeed beyond expectations.
according to my observation, from the beginning until now I joined the cryptocurency and also active as a bounty hunter, I see every project launched has a CEO Team and has several Advisors to help develop projects and Advisors who will bring investors to invest in projects that they support from the collaboration between the CEO and Advisor teams ... and in my opinion the failure of a project is not based on the greatness and expertise of the promotion ... but many investors are looking at the product and business being worked on and which will be done from now until later in future..