Are you fishing for me to admit my age? haha. Let's see.....from the demographics you posted, I am either over or under 55, either a grandparent, parent, of kid. I think I fit in there somewhere!
To answer you question about finding cruises, I would make a couple of suggestions. Normally on a LL page, featured listings are for specific locations with packages. Under the cruise page this is not always true. Often clicking on the "featured" links only gets you to a listing for the company and no packages. Clicking on the featured link for Uniworld only gets you 1 trip - not the full list. This leaves viewers with the impression that only a couple are available. Only when you click on "all offers" do you get the full list. Perhaps this can be changed a bit. Another change I would make is under the LL site's search feature. If a country or city are searched and there is a cruise that goes to / from / through that location, then that cruise should come up on the list of properties / packages offered. Right now it is hit and miss. For example, if you search Amsterdam today, Regents cruises comes up on the list but they do not have a current LL offering. On the other hand, Uniworld, which does have current offerings that go to / from Amsterdam do not show up in the search.
Be careful when you bid. On all cruises (barges and ocean) a room might not be available. On Luxury Link's site they say subject to availability. I just bid on one and did not get it because would have had to upgrade and pay more money. Solution: You can call Luxury Link before you bid and find out if they do indeed have the room advertised.