Musicians
There is a saying amongst artists that they can die of exposure.
What this means is that events, fundraisers, attractions all need artists. Usually, they need musicians but there is not much of a budget.
Therefore it is easy for a fundraiser or a bar or a restaurant or an event to want musicians to play for free or for very little, and to think that exposure for the band to an audience is fair compensation. More often than not, our local musicians are extremely generous and will play for free or for far less than they are worth.
Confession. I am guilty of this myself. For more than one event I have asked musicians to play for busking fees and honorariums and the local musicians have graciously accommodated me.