Unfortunately many people in many industries take advantage of others ignorance. I know personally someone who books many chasanim and young couples hotels and flights in which he buys points/free nights/credits and charges them much more plus extra for status which nobody here pays for. There are many other examples. This clear deal is just another. I don't necessarily know if there is something wrong with this, at the end of the day both people are happy and got a good deal, and it's for sure not in the same category as the cc toeles harabim guy
Is it taking advantage of Ignorance? I spent a half hour on the phone yesterday helping someone book a vacation, he wanted flights, hotels, restaurants. He happens to have a Amex points and wanted a hilton hotel. He had no idea he can transfer etc. I didnt charge him, but if i would i dont think its charging his ignorance, its charging for my service/knowledge.
Like i said earlier, people have a knack for it. If a couple was going to go to a Hyatt for a shabbos and spend $1000 on a suite. And this guy goes on the forums, find someone with a suite upgrade, makes the booking, call Hyatt to upgrade, calls hyatt again to change from a double bed to single bed, lets the guy know he has globilst so he can get free breakfast and late check and only changes the couple $500.. I dont think there is anything wrong. no one is being taken advantage if.....