The higher the bonus, the lower the number of participants, which is why I do not participate in these campaigns have many high ranking participants because it is not worth your time, shares will Less is more because too many high rankings will get your share 
i fill you dude, you are correct mostly of the campaign especially in signature only those have a high rank can participate. I am only a member rank but i am holding it even the earnings is low, and also do a double effort in social median campaign atleast i have additional earning's 😁