Deborah, you said "While I disagree with those below who state that this is "intended to lure you into their site and pay their fees"if you are uninformed about their sources, you may feel that way."
This is actually a bait and switch approach which is illegal. Look below to see more.
Per The Federal Trade Commission
Sec. 238.1 Bait advertisement.
No advertisement containing an offer to sell a product should be published when the offer is not a bona fide effort to sell the advertised product. [Guide 1]
Sec. 238.2 Initial offer.
(a) No statement or illustration should be used in any advertisement which creates a false impression of the grade, quality, make, value, currency of model, size, color, usability, or origin of the product offered, or which may otherwise misrepresent the product in such a manner that later, on disclosure of the true facts, the purchaser may be switched from the advertised product to another.
(b) Even though the true facts are subsequently made known to the buyer, the law is violated if the first contact or interview is secured by deception.