Paul,
A Courtesan is required to split cash tips of usually $100 or more with the house. Also, extravagant gifts must be split with the house too. However, gifts and gift certificates of $100 or less are not normally subject to this requirement. I’ve listed another thread concerning “Gifts for the Ladies” for additional information.
Gifts for the Ladies http://newblog.sherisranch.com/forums/topic/gifts-for-the-ladies/#post-6497