If I own the project I won't agree statement like this. They want to promote massively without spending more money. So without limitation they will got massive participant with the same amount of money. Profit? Yes profit for owner not for us. Remember they create bounty program for promoting product not for make us rich.
Yes it is true, the fact is that many projects do not limit the number of people who can participate in it because they can get many people to be able to promote their projects and I think this is a very good and beneficial thing for them because more and more people are promoting projects the higher the chance of getting investors to invest and use the funds to develop their projects.