I don't agree with you. Usually a lot of participants means that the campaign is good and will raise good money. In the end of the day they are paying percentage from the funds raised.
Its worth for the bounty campaign in making a long time project sale because it carries many investors to invest good for a long term investment but if you are a pre-earner its hard to make profitable because it takes a months or a year to have done waiting for the distribution of token which is the earnings is the same as the other campaign which is months ago salling or done.