"FREE VACATIONS! (you have to sit through a timeshare presentation and there are catches"

We widely regard the above as unethical.

Adding content to a search engine literally says "you can come read this content!". That is the purpose of search engines. Even Google penalizes paywall behavior and will downrank them - which forces the paywall people to get more clever.

Sorry but don't abuse search engines and users to sell your content. Buy ads like a big boy.