Conversation so far:
how did Woodes Rogers prepare for his privateering expedition against the Spanish?
In late 1707, Rogers was approached by William Dampier, a navigator and friend of Rogers' father.
why did William Dampier approach Woodes Rogers?
William Dampier proposed a privateering expedition against the Spanish.
what had happened to William Dampier's career prior to approaching Woodes Rogers?
Dampier had recently returned from leading a two-ship privateering expedition into the Pacific, which culminated in a series of mutinies before both ships finally sank due to Dampier's error.
what error had William Dampier made during his two-ship privateering expedition into the Pacific?
not having the hulls properly protected against worms before leaving port.
and did Woodes Rogers agree to William Dampier's proposal privateering expedition against the Spanish?
Unaware of this, Rogers agreed.
what did Woodes Rogers do after agreeing to William Dampier's proposed privateering expedition against the Spanish?
Financing was provided by many in the Bristol community.
was William Dampier with Woodes Rogers on the privateering expedition against the Spanish?
Dampier was aboard as Rogers' sailing master.
did Woodes Rogers and William Dampier have any problems on the privateering expedition voyage against the Spanish?
Rogers encountered various problems along the way.
what problems did Woodes Rogers encounter during his privateering expedition voyage against the Spanish?
Forty of the Bristol crew deserted or were dismissed, and he spent a month in Ireland recruiting replacements and having the vessels prepared for sea.

Question: why did they do that?
Self-contained rewrite: why did forty of the Bristol crew of Woodes Rogers desert or were dismissed?