Free: Contests & Raffles.
As an example: California has (or had) an extensive charter (party boat) scene. Back in the 1980's, a limit on a bottom fishing trip was 15 rockfish and 5 lingcod. On the way back in, the deckhands would start filleting the catch......$5 for a rockfish limit and $1 each for lingcod. You could round that up if you wanted. Everyone seemed happy with the arrangement.
Just here to say that tipping culture is out of control. There is no legitimate reason why the deckhand pay shouldn't be priced into the charter fee, except to make the trip appear cheaper than it is and get the charter operator off the hook for associated labor expenses.That said, don't punish the kids for this business practice. Chartering is a luxury service. If you choose to charter, accept all costs involved (no matter how ridiculous) and don't try to get off cheap at the deckhand's expense.That is all.