Answer:
Nonprofits are tax-exempt or charitable, meaning they do not pay income tax on the money that they receive for their organization.
.org does because org is short for organisation.
Helps the reader memorize it and the listener to get drawn in
The part of this excerpt that is directed against a particular social class in Ireland is "..I grant this food will be somewhat dear, and therefore very proper for landlords, who, as they have already devoured most of the parents, seem to have the best title to the children..."
In this part Jonathan Swift criticizes powerful and rich people, mocking landlords for being a part of a high social class.