Personal measurements can be made of yourself to enter into a clothing catalog. However, intrusive advertisements, the main financial support of push technology, may show up as jingles which constantly try to entice you. This can be annoying, but a low price to pay for this inexpensive service. The Web is not regulated. Push media is like TV being pushed through your computer.
TV is regulated.
Push media is content provided by the corporations who can afford pages, gather select information, and present it to you. Limited information is piped, or narrowcasted, to users.