also - typically if you help with a delivery, you won't be expected to contribute to boat-related expenses, or food that is provisioned for the voyage.
nearly all transatlantic passages are deliveries of one sort or another - especially the east-bound trips
it's not even that uncommon for return airfare to be provided. getting paid a daily rate is less common, and typically requires experience
if it's more of a cruise - sailing around.., stopping here or there.., then sharing of expenses is a bit more common
also some transatlantic events - like the ARC - have a few boats that charge money for berths - some of them are businesses, and some are just owners tying to defray part of the cost. The ARC is something that a lot of people aspire to do, so there is a bit of a market for spots. But even in the ARC, which gets 200 boats, probably fewer than 5 or 10 % of the crew are even contributing to expenses.