I think bounty campaigns are an integral part of the marketing campaign of any ICO. You do not have to pay any kind of cash but can increase the hype of the project. So, It is foolish not to make a bounty campaign to increase the hype of the project.
It is, and it will always be an integral part of marketing campaign for most projects.
So far, it has been known as the cheapest way of pushing the idea and the product out there to potential investors and we have known how it has really helped in the success of so many project.
Quality of bounty dropping is practically based on people who are just joining everything they see and forgetting that this is a decentralize space and there will always be scams, so in that case, it is better you pick a project that is worth your time, no matter how little they are.