I don’t remember using Expedia, the online booking agency, to buy airline tickets though I’ve used it to compare prices. This time they had the best price on a nonstop ticket to Montego Bay. That clinched it. A few days after I’d completed my purchase, I received an email from Expedia introducing my personal Jamaica concierge. Although I didn’t need the complimentary concierge service, which is provided by an Expedia...